Doubly magic : High-spin states, isomers, and collectivity in the yrast decay
Abstract
Yrast and near-yrast levels up to spin values in excess of I = 30h have been delineated in the doubly-magic 208Pb nucleus following deep-inelastic reactions involving 208Pb targets and, mostly, 430-MeV 48Ca and 1440-MeV 208Pb beams. The level scheme was established up to an excitation energy of 16.4 MeV, based on multi-fold γ-ray coincidence relationships measured with the Gammasphere array. Below the well-known, 0.5-μs 10+ isomer, ten new transitions were added to earlier work. The delineation of the higher parts of the level sequence benefited from analyses involving a number of prompt- and delayed-coincidence conditions. Three new isomeric states were established along the yrast line with I π = 20- (10342 keV), 23+ (11361 keV), and 28- (13675 keV), and respective half-lives of 22(3), 12.7(2), and 60(6) ns. Gamma transitions were also identified preceding in time the 28- isomer, however, only a few could be placed in the level scheme and no firm spin-parity quantum numbers could be proposed. In contrast, for most states below this 28- isomer, firm spin-parity values were assigned, based on total electron-conversion coefficients, deduced for low-energy (<500 keV) transitions from γ-intensity balances, and on measured γ-ray angular distributions. The latter also enabled the quantitative determinationmore »
- Authors:
-
- Polish Academy of Sciences (PAS), Krakow (Poland). Inst. of Nuclear Physics
- Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
- Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; Univ. of Maryland, College Park, MD (United States). Dept. of Chemistry and Biochemistry
- Argonne National Lab. (ANL), Argonne, IL (United States). Nuclear Engineering Division
- Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
- Univ. of Maryland, College Park, MD (United States). Dept. of Chemistry and Biochemistry
- Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy and National Superconducting Cyclotron Lab.
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP); Polish National Science Centre (NCN); National Science Foundation (NSF)
- OSTI Identifier:
- 1374540
- Alternate Identifier(s):
- OSTI ID: 1363716
- Grant/Contract Number:
- AC02-06CH11357; FG02-94ER40834; PHY-1404442
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: 6; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Broda, R., Janssens, R. V. F., Iskra, Ł. W., Wrzesinski, J., Fornal, B., Carpenter, M. P., Chiara, C. J., Cieplicka-Oryńczak, N., Hoffman, C. R., Kondev, F. G., Królas, W., Lauritsen, T., Podolyak, Zs., Seweryniak, D., Shand, C. M., Szpak, B., Walters, W. B., Zhu, S., and Brown, B. A. Doubly magic Pb208 : High-spin states, isomers, and E3 collectivity in the yrast decay. United States: N. p., 2017.
Web. doi:10.1103/PhysRevC.95.064308.
Broda, R., Janssens, R. V. F., Iskra, Ł. W., Wrzesinski, J., Fornal, B., Carpenter, M. P., Chiara, C. J., Cieplicka-Oryńczak, N., Hoffman, C. R., Kondev, F. G., Królas, W., Lauritsen, T., Podolyak, Zs., Seweryniak, D., Shand, C. M., Szpak, B., Walters, W. B., Zhu, S., & Brown, B. A. Doubly magic Pb208 : High-spin states, isomers, and E3 collectivity in the yrast decay. United States. https://doi.org/10.1103/PhysRevC.95.064308
Broda, R., Janssens, R. V. F., Iskra, Ł. W., Wrzesinski, J., Fornal, B., Carpenter, M. P., Chiara, C. J., Cieplicka-Oryńczak, N., Hoffman, C. R., Kondev, F. G., Królas, W., Lauritsen, T., Podolyak, Zs., Seweryniak, D., Shand, C. M., Szpak, B., Walters, W. B., Zhu, S., and Brown, B. A. Mon .
"Doubly magic Pb208 : High-spin states, isomers, and E3 collectivity in the yrast decay". United States. https://doi.org/10.1103/PhysRevC.95.064308. https://www.osti.gov/servlets/purl/1374540.
@article{osti_1374540,
title = {Doubly magic Pb208 : High-spin states, isomers, and E3 collectivity in the yrast decay},
author = {Broda, R. and Janssens, R. V. F. and Iskra, Ł. W. and Wrzesinski, J. and Fornal, B. and Carpenter, M. P. and Chiara, C. J. and Cieplicka-Oryńczak, N. and Hoffman, C. R. and Kondev, F. G. and Królas, W. and Lauritsen, T. and Podolyak, Zs. and Seweryniak, D. and Shand, C. M. and Szpak, B. and Walters, W. B. and Zhu, S. and Brown, B. A.},
abstractNote = {Yrast and near-yrast levels up to spin values in excess of I = 30h have been delineated in the doubly-magic 208Pb nucleus following deep-inelastic reactions involving 208Pb targets and, mostly, 430-MeV 48Ca and 1440-MeV 208Pb beams. The level scheme was established up to an excitation energy of 16.4 MeV, based on multi-fold γ-ray coincidence relationships measured with the Gammasphere array. Below the well-known, 0.5-μs 10+ isomer, ten new transitions were added to earlier work. The delineation of the higher parts of the level sequence benefited from analyses involving a number of prompt- and delayed-coincidence conditions. Three new isomeric states were established along the yrast line with I π = 20- (10342 keV), 23+ (11361 keV), and 28- (13675 keV), and respective half-lives of 22(3), 12.7(2), and 60(6) ns. Gamma transitions were also identified preceding in time the 28- isomer, however, only a few could be placed in the level scheme and no firm spin-parity quantum numbers could be proposed. In contrast, for most states below this 28- isomer, firm spin-parity values were assigned, based on total electron-conversion coefficients, deduced for low-energy (<500 keV) transitions from γ-intensity balances, and on measured γ-ray angular distributions. The latter also enabled the quantitative determination of mixing ratios. The transition probabilities extracted for all isomeric transitions in 208Pb have been reviewed and discussed in terms of the intrinsic structure of the initial and final levels involved. Particular emphasis was placed on the many observed E3 transitions as they often exhibit significant enhancements in strength (of the order of tens of W.u.) comparable to the one seen for the neutron j15/2→g9/2 E3 transition in 209Pb. In this context, the enhancement of the 725-keV E3 transition (56 W.u.) associated with the decay of the highest-lying 28- isomer observed in this work remains particularly challenging to explain. Large-scale shell-model calculations were performed with two approaches, a first one where the 1, 2, and 3 particle-hole excitations do not mix with one another, and another more complex one, in which such mixing takes place. We compared the calculated levels with the data and a general agreement is observed for most of the 208Pb level scheme. At the highest spins and energies, however, the 2 correspondence between theory and experiment is less satisfactory and the experimental yrast line appears to be more regular than the calculated one. This regularity is notable when the level energies are plotted versus the I(I+1) product and the observed, nearly linear, behavior was considered within a simple “rotational” interpretation. Furthermore, within this approximate picture, the extracted moment of inertia suggests that only the 76 valence nucleons participate in the “rotation” and that the 132Sn spherical core remains inert.},
doi = {10.1103/PhysRevC.95.064308},
journal = {Physical Review C},
number = 6,
volume = 95,
place = {United States},
year = {2017},
month = {6}
}
Works referenced in this record:
Electromagnetic decay of 10+ states and yrast isomers in 208Pb
journal, April 1989
- Roy, N.; Maier, K. H.; Aprahamian, A.
- Physics Letters B, Vol. 221, Issue 1
High-spin yrast structure of from the decay of a four-hole, isomer
journal, October 2015
- Wrzesiński, J.; Lane, G. J.; Maier, K. H.
- Physical Review C, Vol. 92, Issue 4
Double-Octupole States in
journal, December 2000
- Brown, B. Alex
- Physical Review Letters, Vol. 85, Issue 25
Effective Charge of the Orbital and the Electric Field Gradient of Hg from the Yrast Structure of
journal, November 2001
- Fornal, B.; Broda, R.; Maier, K. H.
- Physical Review Letters, Vol. 87, Issue 21
Study of excited states in Pb by particle- coincidences with the and reactions
journal, September 1997
- Schramm, M.; Maier, K. H.; Rejmund, M.
- Physical Review C, Vol. 56, Issue 3
High-spin states and isomers in the one-proton-hole and three-neutron-hole Tl isotope
journal, July 2011
- Broda, R.; Maier, K. H.; Fornal, B.
- Physical Review C, Vol. 84, Issue 1
Nuclear Data Sheets for A = 208
journal, August 2007
- Martin, M. J.
- Nuclear Data Sheets, Vol. 108, Issue 8
The $\pi h_{11/2}^{-1}\nu i_{13/2}^{-2}$ three-hole isomeric state and octupole core excitation in the 205 Tl nucleus
journal, April 2003
- Wrzesiński, J.; Broda, R.; Fornal, B.
- The European Physical Journal A, Vol. 20, Issue 1
Bonn potential and shell-model calculations for isotones
journal, November 1999
- Coraggio, L.; Covello, A.; Gargano, A.
- Physical Review C, Vol. 60, Issue 6
High resolution electron scattering from high spin states in
journal, June 1992
- Connelly, J. P.; DeAngelis, D. J.; Heisenberg, J. H.
- Physical Review C, Vol. 45, Issue 6
High-spin states in 208Pb
journal, May 2001
- Wrzesiński, J.; Maier, K. H.; Broda, R.
- The European Physical Journal A, Vol. 10, Issue 3
Particle octupole-vibration coupling near 208Pb
journal, July 2000
- Rejmund, M.; Maier, K. H.; Broda, R.
- The European Physical Journal A, Vol. 8, Issue 2
Yrast structure of the two-proton- and three-neutron-hole nucleus from the decay of a isomer
journal, June 2011
- Szpak, B.; Maier, K. H.; Smolkowska, A. S.
- Physical Review C, Vol. 83, Issue 6
?-decay of the particle-hole states with the highest spins in208Pb
journal, December 1993
- Schramm, M.; Grawe, H.; Heese, J.
- Zeitschrift f�r Physik A Hadrons and Nuclei, Vol. 344, Issue 4
Derivation of wave functions and matrix elements of the residual interaction in from experimental data
journal, May 1999
- Rejmund, M.; Schramm, M.; Maier, K. H.
- Physical Review C, Vol. 59, Issue 5
On the origin of the 2485 keV?-ray observed in near-barrier collisions of various heavy ions with208Pb
journal, March 1992
- Schramm, M.; Grawe, H.; Heese, J.
- Zeitschrift f�r Physik A Hadrons and Nuclei, Vol. 344, Issue 1
Yrast structure of Bi: Isomeric states and one-proton-particle, three-neutron-hole excitations
journal, November 2012
- Cieplicka, N.; Maier, K. H.; Fornal, B.
- Physical Review C, Vol. 86, Issue 5
Complete identification of states in below MeV
journal, May 2016
- Heusler, A.; Jolos, R. V.; Faestermann, T.
- Physical Review C, Vol. 93, Issue 5
Appraisal of the Kuo-Herling shell-model interaction and application to A =210–212 nuclei
journal, February 1991
- Warburton, E. K.; Brown, B. A.
- Physical Review C, Vol. 43, Issue 2
Nuclear Data Sheets for A = 209
journal, May 2015
- Chen, J.; Kondev, F. G.
- Nuclear Data Sheets, Vol. 126
Two-particle states in 210Pb, 210Bi and 210Po with realistic forces
journal, February 1972
- Herling, G. H.; Kuo, T. T. S.
- Nuclear Physics A, Vol. 181, Issue 1
Hard-to-reach nuclei studied with deep-inelastic heavy-ion reactions
journal, April 2003
- Broda, R.; Fornal, B.; Królas, W.
- The European Physical Journal A, Vol. 20, Issue 1
Spectroscopic studies with the use of deep-inelastic heavy-ion reactions
journal, May 2006
- Broda, R.
- Journal of Physics G: Nuclear and Particle Physics, Vol. 32, Issue 6
Review of metastable states in heavy nuclei
journal, May 2016
- Dracoulis, G. D.; Walker, P. M.; Kondev, F. G.
- Reports on Progress in Physics, Vol. 79, Issue 7
γ Spectroscopy of 209Pb with deep inelastic reactions
journal, March 1998
- Rejmund, M.; Maier, K. H.; Broda, R.
- The European Physical Journal A, Vol. 1, Issue 3
Bonn Potential and Shell-Model Calculations for N=126 Isotones
text, January 1999
- Coraggio, L.; Covello, A.; Gargano, A.
- arXiv
Works referencing / citing this record:
Two-neutron and core-excited states in : Tracing collectivity and evidence for a new -decaying isomer in
journal, August 2018
- Broda, R.; Iskra, Ł. W.; Janssens, R. V. F.
- Physical Review C, Vol. 98, Issue 2
Description of one-particle one-hole configurations coupled to the yrast state in the doubly magic nucleus
journal, March 2019
- Heusler, A.; Jolos, R. V.; von Brentano, P.
- Physical Review C, Vol. 99, Issue 3