Anomalous neutron yields confirmed for Ba-Mo and newly observed for Ce-Zr from spontaneous fission of
Abstract
We reinvestigated the neutron multiplicity yields of Ba-Mo, Ce-Zr, Te-Pd, and Nd-Sr from the spontaneous fission of 252Cf by (i) using both γ-γ-γ-γ and y-γ-γ coincidence data, (ii) using up to date level scheme structures, and (iii) crosschecking analogous energy transitions in multiple isotopes, we have achieved higher precision than previous analyses. Particular attention was given to the Ba-Mo pairs where our results clearly confirm that the Ba-Mo yield data have a second hot fission mode where 8–10, and now 11 neutron evaporation channels are observed. These are the first observations of the 11 neutron channel. These 8–11 neutron channels are observed for the first time in the Ce-Zr pairs, but are not observed in other fission pairs. The measured intensities of the second mode in Ba-Mo and Ce-Zr pairs are ~1.5(4)% and ~1.0(3)%, respectively. These high neutron number evaporation modes can be an indication of hyperdeformation and/or octupole deformation in 143–145Ba and in 146,148Ce at scission to give rise to such high neutron multiplicities.
- Authors:
-
- Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics and Astronomy
- Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics and Astronomy; Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics and Astronomy
- Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics and Astronomy; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation)
- Tsinghua Univ., Beijing (China). Dept. of Physics
- Publication Date:
- Research Org.:
- Vanderbilt Univ., Nashville, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1605559
- Alternate Identifier(s):
- OSTI ID: 1605316; OSTI ID: 1809144
- Grant/Contract Number:
- FG05-88ER40407; AC03-76SF00098; FG02-88ER40407
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 101; Journal Issue: 3; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 252-Cf; fission; yields matrix; extra hot fission mode; octupole; hyperderformation
Citation Formats
Musangu, B. M., Thibeault, A. H., Richards, T. H., Wang, E. H., Hamilton, J. H., Zachary, C. J., Eldridge, J. M., Ramayya, A. V., Luo, Y. X., Rasmussen, J. O., Ter-Akopian, G. M., Oganessian, Yu. Ts., and Zhu, S. J. Anomalous neutron yields confirmed for Ba-Mo and newly observed for Ce-Zr from spontaneous fission of Cf252. United States: N. p., 2020.
Web. doi:10.1103/PhysRevC.101.034610.
Musangu, B. M., Thibeault, A. H., Richards, T. H., Wang, E. H., Hamilton, J. H., Zachary, C. J., Eldridge, J. M., Ramayya, A. V., Luo, Y. X., Rasmussen, J. O., Ter-Akopian, G. M., Oganessian, Yu. Ts., & Zhu, S. J. Anomalous neutron yields confirmed for Ba-Mo and newly observed for Ce-Zr from spontaneous fission of Cf252. United States. https://doi.org/10.1103/PhysRevC.101.034610
Musangu, B. M., Thibeault, A. H., Richards, T. H., Wang, E. H., Hamilton, J. H., Zachary, C. J., Eldridge, J. M., Ramayya, A. V., Luo, Y. X., Rasmussen, J. O., Ter-Akopian, G. M., Oganessian, Yu. Ts., and Zhu, S. J. Tue .
"Anomalous neutron yields confirmed for Ba-Mo and newly observed for Ce-Zr from spontaneous fission of Cf252". United States. https://doi.org/10.1103/PhysRevC.101.034610. https://www.osti.gov/servlets/purl/1605559.
@article{osti_1605559,
title = {Anomalous neutron yields confirmed for Ba-Mo and newly observed for Ce-Zr from spontaneous fission of Cf252},
author = {Musangu, B. M. and Thibeault, A. H. and Richards, T. H. and Wang, E. H. and Hamilton, J. H. and Zachary, C. J. and Eldridge, J. M. and Ramayya, A. V. and Luo, Y. X. and Rasmussen, J. O. and Ter-Akopian, G. M. and Oganessian, Yu. Ts. and Zhu, S. J.},
abstractNote = {We reinvestigated the neutron multiplicity yields of Ba-Mo, Ce-Zr, Te-Pd, and Nd-Sr from the spontaneous fission of 252Cf by (i) using both γ-γ-γ-γ and y-γ-γ coincidence data, (ii) using up to date level scheme structures, and (iii) crosschecking analogous energy transitions in multiple isotopes, we have achieved higher precision than previous analyses. Particular attention was given to the Ba-Mo pairs where our results clearly confirm that the Ba-Mo yield data have a second hot fission mode where 8–10, and now 11 neutron evaporation channels are observed. These are the first observations of the 11 neutron channel. These 8–11 neutron channels are observed for the first time in the Ce-Zr pairs, but are not observed in other fission pairs. The measured intensities of the second mode in Ba-Mo and Ce-Zr pairs are ~1.5(4)% and ~1.0(3)%, respectively. These high neutron number evaporation modes can be an indication of hyperdeformation and/or octupole deformation in 143–145Ba and in 146,148Ce at scission to give rise to such high neutron multiplicities.},
doi = {10.1103/PhysRevC.101.034610},
journal = {Physical Review C},
number = 3,
volume = 101,
place = {United States},
year = {2020},
month = {3}
}
Works referenced in this record:
New isomeric states in 152,154,156Nd produced by spontaneous fission of 252Cf
journal, April 1998
- Gautherin, C.; Houry, M.; Korten, W.
- The European Physical Journal A, Vol. 1, Issue 4
New insights from studies of spontaneous fission with large detector arrays
journal, January 1995
- Hamilton, J. H.; Ramayya, A. V.; Zhu, S. J.
- Progress in Particle and Nuclear Physics, Vol. 35
Study of the Mo-Ba partition in 252Cf spontaneous fission
journal, February 2000
- Biswas, D. C.; Choudhury, R. K.; Cinausero, M.
- The European Physical Journal A, Vol. 7, Issue 2
New results for the intensity of bimodal fission in barium channels of the spontaneous fission of
journal, July 2006
- Goodin, C.; Fong, D.; Hwang, J. K.
- Physical Review C, Vol. 74, Issue 1
Near-yrast, medium-spin structure of the nucleus
journal, August 2005
- Urban, W.; Rząca-Urban, T.; Pinston, J. A.
- Physical Review C, Vol. 72, Issue 2
Nuclear-charge distribution and delayed-neutron yields for thermal-neutron-induced fission of 235U, 233U, and 239Pu and for spontaneous fission of 252Cf
journal, May 1988
- Wahl, Arthur C.
- Atomic Data and Nuclear Data Tables, Vol. 39, Issue 1
Band structure of Ce
journal, July 2012
- Urban, W.; Rząca-Urban, T.; Syntfeld-Każuch, A.
- Physical Review C, Vol. 86, Issue 1
Mapping neutron levels in the region: The [411] band in
journal, June 2009
- Urban, W.; Pinston, J. A.; Rząca-Urban, T.
- Physical Review C, Vol. 79, Issue 6
New Spontaneous Fission Mode for : Indication of Hyperdeformed at Scission
journal, July 1996
- Ter-Akopian, G. M.; Hamilton, J. H.; Oganessian, Yu. Ts.
- Physical Review Letters, Vol. 77, Issue 1
Identification of band structures and proposed one- and two-phonon γ-vibrational bands in
journal, November 2006
- Ding, H. B.; Zhu, S. J.; Hamilton, J. H.
- Physical Review C, Vol. 74, Issue 5
The neutron extruder orbital in
journal, September 2009
- Urban, W.; Pinston, J. A.; Simpson, G. S.
- Physical Review C, Vol. 80, Issue 3
Neutron Multiplicities and Yields of Correlated Zr-Ce and Mo-Ba Fragment Paris in Spontaneous Fission of
journal, September 1994
- Ter-Akopian, G. M.; Hamilton, J. H.; Oganessian, Yu. Ts.
- Physical Review Letters, Vol. 73, Issue 11
Near-yrast structure of the nucleus
journal, March 2006
- Urban, W.; Droste, Ch.; Rząca-Urban, T.
- Physical Review C, Vol. 73, Issue 3
Near-yrast structure of neutron-rich lanthanide nuclei
journal, February 2010
- Simpson, G. S.; Urban, W.; Pinston, J. A.
- Physical Review C, Vol. 81, Issue 2
Nuclear structure and -decay schemes for Te nuclides beyond
journal, April 2017
- Moon, B.; Moon, C. -B.; Söderström, P. -A.
- Physical Review C, Vol. 95, Issue 4
Two-quasiparticle isomers and bands of and
journal, August 2009
- Simpson, G. S.; Urban, W.; Genevey, J.
- Physical Review C, Vol. 80, Issue 2
New insights into the nuclear structure in neutron-rich 112,114,115,116,117,118Pd
journal, December 2013
- Luo, Y. X.; Rasmussen, J. O.; Hamilton, J. H.
- Nuclear Physics A, Vol. 919
Manifestation of clustering in the 252Cf(sf) and 249Cf(nth,f) reactions
journal, October 1997
- Pyatkov, Yu. V.; Pashkevich, V. V.; Penionzhkevich, Yu. E.
- Nuclear Physics A, Vol. 624, Issue 2
One- and two-phonon -vibrational bands in neutron-rich
journal, September 2017
- Marcellino, J.; Wang, E. H.; Zachary, C. J.
- Physical Review C, Vol. 96, Issue 3
ESCL8R and LEVIT8R: Software for interactive graphical analysis of HPGe coincidence data sets
journal, July 1995
- Radford, D. C.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 361, Issue 1-2
Unexpected spin of the ground state in Ba: No octupole deformation in ground states of odd- Ba isotopes
journal, March 2013
- Rząca-Urban, T.; Urban, W.; Smith, A. G.
- Physical Review C, Vol. 87, Issue 3
Yields of correlated fragment pairs in spontaneous fission of Cf
journal, March 1997
- Ter-Akopian, G. M.; Hamilton, J. H.; Oganessian, Yu. Ts.
- Physical Review C, Vol. 55, Issue 3
New determination of the Ba-Mo yield matrix for
journal, August 2000
- Wu, S. -C.; Donangelo, R.; Rasmussen, J. O.
- Physical Review C, Vol. 62, Issue 4
Identification of new transitions and mass assignments of levels in
journal, September 2015
- Wang, E. H.; Lemasson, A.; Hamilton, J. H.
- Physical Review C, Vol. 92, Issue 3
Cluster Aspects of 252 Cf Spontaneous Fission
journal, December 1998
- Donangelo, R.; Rasmussen, J. O.; Stoyer, M. A.
- International Journal of Modern Physics E, Vol. 07, Issue 06
Direct Evidence of Octupole Deformation in Neutron-Rich
journal, March 2016
- Bucher, B.; Zhu, S.; Wu, C. Y.
- Physical Review Letters, Vol. 116, Issue 11
Search for octupole correlations in neutron-rich nucleus
journal, May 2006
- Chen, Y. J.; Zhu, S. J.; Hamilton, J. H.
- Physical Review C, Vol. 73, Issue 5
Nuclear scission
journal, December 1990
- Brosa, Ulrich; Grossmann, Siegfried; Müller, Andreas
- Physics Reports, Vol. 197, Issue 4
Octupole correlations in neutron-rich and a type of superdeformed band in
journal, October 1999
- Zhu, S. J.; Hamilton, J. H.; Ramayya, A. V.
- Physical Review C, Vol. 60, Issue 5
Resolution of complex γ spectra from triple-coincidence data: Ba–Mo split in 252Cf spontaneous fission
journal, March 2002
- Wu, S. -C; Donangelo, R.; Rasmussen, J. O.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 480, Issue 2-3