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Title: Level density rotational enhancement factor

Abstract

Bethe wrote a pivotal paper providing the formalism for the theory of nuclear level densities. At that time, there were no known deformed nuclei, so Bethe made the assumption that all nuclei are spherical. After deformed nuclei were discovered, theorists predicted that the level density for such nuclei should be substantially enhanced over the level density for neighboring spherical nuclei. Despite these results, two comprehensive level density compilations based on neutron resonances counting at low neutron energy failed to find significant enhancement in level density for deformed nuclei. A recent paper has concluded that the Bethe spin distribution for nuclear levels is not appropriate for deformed nuclei. When a more accurate spin distribution is used in resonance analysis, it is found that an enhancement of approximately the predicted magnitude is observed.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Ohio Univ., Athens, OH (United States)
Publication Date:
Research Org.:
Ohio Univ., Athens, OH (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1542285
Alternate Identifier(s):
OSTI ID: 1546273
Grant/Contract Number:  
NA0001837; FG02-88ER40387; NA-0001837
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 99; 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; Nuclear level density

Citation Formats

Grimes, S. M., Massey, T. N., and Voinov, A. V. Level density rotational enhancement factor. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.99.064331.
Grimes, S. M., Massey, T. N., & Voinov, A. V. Level density rotational enhancement factor. United States. doi:10.1103/PhysRevC.99.064331.
Grimes, S. M., Massey, T. N., and Voinov, A. V. Thu . "Level density rotational enhancement factor". United States. doi:10.1103/PhysRevC.99.064331.
@article{osti_1542285,
title = {Level density rotational enhancement factor},
author = {Grimes, S. M. and Massey, T. N. and Voinov, A. V.},
abstractNote = {Bethe wrote a pivotal paper providing the formalism for the theory of nuclear level densities. At that time, there were no known deformed nuclei, so Bethe made the assumption that all nuclei are spherical. After deformed nuclei were discovered, theorists predicted that the level density for such nuclei should be substantially enhanced over the level density for neighboring spherical nuclei. Despite these results, two comprehensive level density compilations based on neutron resonances counting at low neutron energy failed to find significant enhancement in level density for deformed nuclei. A recent paper has concluded that the Bethe spin distribution for nuclear levels is not appropriate for deformed nuclei. When a more accurate spin distribution is used in resonance analysis, it is found that an enhancement of approximately the predicted magnitude is observed.},
doi = {10.1103/PhysRevC.99.064331},
journal = {Physical Review C},
number = 6,
volume = 99,
place = {United States},
year = {2019},
month = {6}
}

Journal Article:
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Works referenced in this record:

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