Experimental observation of the M1 scissors mode in 254No
Abstract
We present the first experimental evidence of the scissors mode in the superheavy nucleus 254No produced in the 208Pb(48Ca, 2$$\mathcal{n}\gamma$$))254No reaction. The spectrum of γ rays emitted by the excited 254No nuclei shows an enhanced γ-ray yield for transition energies of ≈2.5 MeV. By measuring the linear polarization properties of the emitted γ rays, we confirm that the transitions in the enhancement region are predominantly of magnetic-dipole character, characteristic for the scissors mode. To further characterize the enhanced γ-ray yield, simulations of the electromagnetic decay of 254No were performed. The observed enhancement is reproduced by including an M1 component in the γ strength function with total strength $$B(M1\uparrow) = 11.8(19) \mu^{2}_{N}$$. This is in good agreement with the integrated M1 strength from sum-rule estimates and new calculations within the quasi-particle random-phase approximation presented here. Our results provide a stringent test of phenomenological formulae for the scissors mode currently used in stellar nucleosynthesis calculations. We find that those formulae are not satisfactory, and we recommend using sum-rule estimates assuming a rigid-body moment of inertia instead for describing the scissors mode in superheavy nuclei.
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- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); European Research Council (ERC); Academy of Finland; Science and Technology Facilities Council (STFC)
- OSTI Identifier:
- 1891679
- Alternate Identifier(s):
- OSTI ID: 1891724
- Report Number(s):
- LLNL-JRNL-826474
Journal ID: ISSN 0370-2693; S037026932200613X; 137479; PII: S037026932200613X
- Grant/Contract Number:
- AC52-07NA27344; 637686
- Resource Type:
- Published Article
- Journal Name:
- Physics Letters. B
- Additional Journal Information:
- Journal Name: Physics Letters. B Journal Volume: 834 Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; scissors mode; y-strength function; transfermium nuclides
Citation Formats
Bello Garrote, F. L., Lopez-Martens, A., Larsen, A. C., Deloncle, I., Péru, S., Zeiser, F., Greenlees, P. T., Kheswa, B. V., Auranen, K., Bleuel, D. L., Cox, D. M., Crespo Campo, L., Giacoppo, F., Görgen, A., Grahn, T., Guttormsen, M., Hagen, T. W., Harkness-Brennan, L., Hauschild, K., Henning, G., Herzberg, R. -D., Julin, R., Juutinen, S., Laplace, T. A., Leino, M., Midtbø, J. E., Modamio, V., Pakarinen, J., Papadakis, P., Partanen, J., Renstrøm, T., Rezynkina, K., Sandzelius, M., Sarén, J., Scholey, C., Siem, S., Sorri, J., Stolze, S., and Uusitalo, J. Experimental observation of the M1 scissors mode in 254No. Netherlands: N. p., 2022.
Web. doi:10.1016/j.physletb.2022.137479.
Bello Garrote, F. L., Lopez-Martens, A., Larsen, A. C., Deloncle, I., Péru, S., Zeiser, F., Greenlees, P. T., Kheswa, B. V., Auranen, K., Bleuel, D. L., Cox, D. M., Crespo Campo, L., Giacoppo, F., Görgen, A., Grahn, T., Guttormsen, M., Hagen, T. W., Harkness-Brennan, L., Hauschild, K., Henning, G., Herzberg, R. -D., Julin, R., Juutinen, S., Laplace, T. A., Leino, M., Midtbø, J. E., Modamio, V., Pakarinen, J., Papadakis, P., Partanen, J., Renstrøm, T., Rezynkina, K., Sandzelius, M., Sarén, J., Scholey, C., Siem, S., Sorri, J., Stolze, S., & Uusitalo, J. Experimental observation of the M1 scissors mode in 254No. Netherlands. https://doi.org/10.1016/j.physletb.2022.137479
Bello Garrote, F. L., Lopez-Martens, A., Larsen, A. C., Deloncle, I., Péru, S., Zeiser, F., Greenlees, P. T., Kheswa, B. V., Auranen, K., Bleuel, D. L., Cox, D. M., Crespo Campo, L., Giacoppo, F., Görgen, A., Grahn, T., Guttormsen, M., Hagen, T. W., Harkness-Brennan, L., Hauschild, K., Henning, G., Herzberg, R. -D., Julin, R., Juutinen, S., Laplace, T. A., Leino, M., Midtbø, J. E., Modamio, V., Pakarinen, J., Papadakis, P., Partanen, J., Renstrøm, T., Rezynkina, K., Sandzelius, M., Sarén, J., Scholey, C., Siem, S., Sorri, J., Stolze, S., and Uusitalo, J. Tue .
"Experimental observation of the M1 scissors mode in 254No". Netherlands. https://doi.org/10.1016/j.physletb.2022.137479.
@article{osti_1891679,
title = {Experimental observation of the M1 scissors mode in 254No},
author = {Bello Garrote, F. L. and Lopez-Martens, A. and Larsen, A. C. and Deloncle, I. and Péru, S. and Zeiser, F. and Greenlees, P. T. and Kheswa, B. V. and Auranen, K. and Bleuel, D. L. and Cox, D. M. and Crespo Campo, L. and Giacoppo, F. and Görgen, A. and Grahn, T. and Guttormsen, M. and Hagen, T. W. and Harkness-Brennan, L. and Hauschild, K. and Henning, G. and Herzberg, R. -D. and Julin, R. and Juutinen, S. and Laplace, T. A. and Leino, M. and Midtbø, J. E. and Modamio, V. and Pakarinen, J. and Papadakis, P. and Partanen, J. and Renstrøm, T. and Rezynkina, K. and Sandzelius, M. and Sarén, J. and Scholey, C. and Siem, S. and Sorri, J. and Stolze, S. and Uusitalo, J.},
abstractNote = {We present the first experimental evidence of the scissors mode in the superheavy nucleus 254No produced in the 208Pb(48Ca, 2$\mathcal{n}\gamma$))254No reaction. The spectrum of γ rays emitted by the excited 254No nuclei shows an enhanced γ-ray yield for transition energies of ≈2.5 MeV. By measuring the linear polarization properties of the emitted γ rays, we confirm that the transitions in the enhancement region are predominantly of magnetic-dipole character, characteristic for the scissors mode. To further characterize the enhanced γ-ray yield, simulations of the electromagnetic decay of 254No were performed. The observed enhancement is reproduced by including an M1 component in the γ strength function with total strength $B(M1\uparrow) = 11.8(19) \mu^{2}_{N}$. This is in good agreement with the integrated M1 strength from sum-rule estimates and new calculations within the quasi-particle random-phase approximation presented here. Our results provide a stringent test of phenomenological formulae for the scissors mode currently used in stellar nucleosynthesis calculations. We find that those formulae are not satisfactory, and we recommend using sum-rule estimates assuming a rigid-body moment of inertia instead for describing the scissors mode in superheavy nuclei.},
doi = {10.1016/j.physletb.2022.137479},
journal = {Physics Letters. B},
number = C,
volume = 834,
place = {Netherlands},
year = {Tue Nov 01 00:00:00 EDT 2022},
month = {Tue Nov 01 00:00:00 EDT 2022}
}
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Works referenced in this record:
Ground-State Band and Deformation of the Isotope
journal, January 1999
- Reiter, P.; Khoo, T. L.; Lister, C. J.
- Physical Review Letters, Vol. 82, Issue 3
Verification of detailed balance for absorption and emission in Dy isotopes
journal, November 2018
- Renstrøm, T.; Utsunomiya, H.; Nyhus, H. T.
- Physical Review C, Vol. 98, Issue 5
Gogny-Hartree-Fock-Bogolyubov plus quasiparticle random-phase approximation predictions of the strength function and its impact on radiative neutron capture cross section
journal, October 2016
- Goriely, S.; Hilaire, S.; Péru, S.
- Physical Review C, Vol. 94, Issue 4
Low-energy M1 excitation mode in 172Yb
journal, February 2006
- Schiller, A.; Voinov, A.; Algin, E.
- Physics Letters B, Vol. 633, Issue 2-3
The Clover: a new generation of composite Ge detectors
journal, August 1999
- Duchêne, G.; Beck, F. A.; Twin, P. J.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 432, Issue 1
Probing Sizes and Shapes of Nobelium Isotopes by Laser Spectroscopy
journal, June 2018
- Raeder, S.; Ackermann, D.; Backe, H.
- Physical Review Letters, Vol. 120, Issue 23
Measurements on prototype Ge and BGO detectors for the Eurogam array
journal, March 1992
- Beausang, C. W.; Forbes, S. A.; Fallon, P.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 313, Issue 1-2
RIPL – Reference Input Parameter Library for Calculation of Nuclear Reactions and Nuclear Data Evaluations
journal, December 2009
- Capote, R.; Herman, M.; Obložinský, P.
- Nuclear Data Sheets, Vol. 110, Issue 12
Gas-filled recoil separator for studies of heavy elements
journal, May 1995
- Leino, M.; Äystö, J.; Enqvist, T.
- Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 99, Issue 1-4
Absolute transmission and separation properties of the gas-filled recoil separator RITU
journal, October 2011
- Sarén, J.; Uusitalo, J.; Leino, M.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 654, Issue 1
RAINIER: A simulation tool for distributions of excited nuclear states and cascade fluctuations
journal, June 2018
- Kirsch, L. E.; Bernstein, L. A.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 892
Heavy Element Spectroscopy At JYFL
conference, January 2005
- Greenlees, P. T.
- AIP Conference Proceedings
In-beam study of 254No
journal, September 1999
- Leino, M.; Kankaanpää, H.; Herzberg, R. -D.
- The European Physical Journal A, Vol. 6, Issue 1
Estimation of scissors mode strength for deformed nuclei in the medium- to heavy-mass region by statistical Hauser-Feshbach model calculations
journal, August 2017
- Mumpower, M. R.; Kawano, T.; Ullmann, J. L.
- Physical Review C, Vol. 96, Issue 2
Parameter-free description of orbital magnetic dipole strength
journal, January 2005
- Enders, J.; von Neumann-Cosel, P.; Rangacharyulu, C.
- Physical Review C, Vol. 71, Issue 1
Level density and -ray strength function in the odd-odd nucleus
journal, April 2014
- Tornyi, T. G.; Guttormsen, M.; Eriksen, T. K.
- Physical Review C, Vol. 89, Issue 4
Limits for qualitative detection and quantitative determination. Application to radiochemistry
journal, March 1968
- Currie, Lloyd A.
- Analytical Chemistry, Vol. 40, Issue 3
Dipole response of U to polarized photons below the neutron separation energy
journal, April 2012
- Hammond, S. L.; Adekola, A. S.; Angell, C. T.
- Physical Review C, Vol. 85, Issue 4
Statistical model calculations in heavy ion reactions
journal, January 1980
- Gavron, A.
- Physical Review C, Vol. 21, Issue 1
LISE++: Radioactive beam production with in-flight separators
journal, October 2008
- Tarasov, O. B.; Bazin, D.
- Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 266, Issue 19-20
Statistical properties of , and cross section calculation
journal, January 2016
- Laplace, T. A.; Zeiser, F.; Guttormsen, M.
- Physical Review C, Vol. 93, Issue 1
Fission Barrier of Superheavy Nuclei and Persistence of Shell Effects at High Spin: Cases of and
journal, December 2014
- Henning, Greg; Khoo, T. L.; Lopez-Martens, A.
- Physical Review Letters, Vol. 113, Issue 26
A statistical analysis of excited nuclear states
journal, May 1959
- Ericson, Torleif
- Nuclear Physics, Vol. 11
Mean field based calculations with the Gogny force: Some theoretical tools to explore the nuclear structure
journal, May 2014
- Péru, S.; Martini, M.
- The European Physical Journal A, Vol. 50, Issue 5
In-beam gamma-ray spectroscopy of 254No
journal, April 2005
- Eeckhaudt, S.; Amzal, N.; Bastin, J. E.
- The European Physical Journal A, Vol. 25, Issue S1
Gogny-HFB+QRPA dipole strength function and its application to radiative nucleon capture cross section
journal, July 2018
- Goriely, S.; Hilaire, S.; Péru, S.
- Physical Review C, Vol. 98, Issue 1
Scissors resonance in the quasicontinuum of Th, Pa, and U isotopes
journal, January 2014
- Guttormsen, M.; Bernstein, L. A.; Görgen, A.
- Physical Review C, Vol. 89, Issue 1
Detailed study of magnetic rotation in 196Pb
journal, August 2002
- Singh, A. K.; Nenoff, N.; Roßbach, D.
- Nuclear Physics A, Vol. 707, Issue 1-2
Level Density of Light Nuclei
journal, March 1968
- Gadioli, E.; Zetta, L.
- Physical Review, Vol. 167, Issue 4
Entry Distribution, Fission Barrier, and Formation Mechanism of
journal, April 2000
- Reiter, P.; Khoo, T. L.; Lauritsen, T.
- Physical Review Letters, Vol. 84, Issue 16
Calibration of the new composite “clover” detector as a Compton polarimeter for the EUROGAM array
journal, August 1995
- Jones, P. M.; Wei, L.; Beck, F. A.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 362, Issue 2-3
-ray strength function and pygmy resonance in rare earth nuclei
journal, March 2001
- Voinov, A.; Guttormsen, M.; Melby, E.
- Physical Review C, Vol. 63, Issue 4
Observation of the Scissors Mode and Evidence for Superfluidity of a Trapped Bose-Einstein Condensed Gas
journal, March 2000
- Maragò, O. M.; Hopkins, S. A.; Arlt, J.
- Physical Review Letters, Vol. 84, Issue 10
Currie detection limits in gamma-ray spectroscopy
journal, August 2004
- De Geer, Lars-Erik
- Applied Radiation and Isotopes, Vol. 61, Issue 2-3
New magnetic dipole excitation mode studied in the heavy deformed nucleus 156Gd by inelastic electron scattering
journal, March 1984
- Bohle, D.; Richter, A.; Steffen, W.
- Physics Letters B, Vol. 137, Issue 1-2
New Isovector Collective Modes in Deformed Nuclei
journal, November 1978
- Iudice, N. Lo; Palumbo, F.
- Physical Review Letters, Vol. 41, Issue 22
Evidence for non-yrast states in 254No
journal, November 2005
- Eeckhaudt, S.; Greenlees, P. T.; Amzal, N.
- The European Physical Journal A, Vol. 26, Issue 2
M1 strength functions from large-scale shell-model calculations and their effect on astrophysical neutron capture cross-sections
journal, March 2012
- Loens, H. P.; Langanke, K.; Martínez-Pinedo, G.
- The European Physical Journal A, Vol. 48, Issue 3
Simple empirical and strength functions for practical applications
journal, January 2019
- Goriely, S.; Plujko, V.
- Physical Review C, Vol. 99, Issue 1
Magnetic dipole excitations in nuclei: Elementary modes of nucleonic motion
journal, September 2010
- Heyde, Kris; von Neumann-Cosel, Peter; Richter, Achim
- Reviews of Modern Physics, Vol. 82, Issue 3
Polarization Measurements on Nuclear Gamma Rays
journal, July 1959
- Fagg, Lawrence W.; Hanna, Stanley S.
- Reviews of Modern Physics, Vol. 31, Issue 3
Evidence of superfluidity in a dipolar supersolid from nonclassical rotational inertia
journal, March 2021
- Tanzi, L.; Maloberti, J. G.; Biagioni, G.
- Science, Vol. 371, Issue 6534
Level Densities from Excitation Functions of Isolated Levels
journal, June 1969
- Huizenga, J. R.; Vonach, H. K.; Katsanos, A. A.
- Physical Review, Vol. 182, Issue 4
Radiative strength functions in
journal, February 2010
- Nyhus, H. T.; Siem, S.; Guttormsen, M.
- Physical Review C, Vol. 81, Issue 2
The unfolding of continuum γ-ray spectra
journal, June 1996
- Guttormsen, M.; Tveter, T. S.; Bergholt, L.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 374, Issue 3
Nuclear isomers in superheavy elements as stepping stones towards the island of stability
journal, August 2006
- Herzberg, R. -D.; Greenlees, P. T.; Butler, P. A.
- Nature, Vol. 442, Issue 7105
Four independent decay properties in the super-deformed well of 143Eu
journal, September 1997
- Leoni, S.; Herskind, B.; Døssing, T.
- Physics Letters B, Vol. 409, Issue 1-4