Proton Single-Particle States In The Heaviest Actinide Nuclei
Abstract
The level structure of 249Bk has been investigated by measuring the {gamma}-ray spectra following the {alpha} decay of a chemically and isotopically pure 253Es sample. Alpha-gamma coincidence measurement was performed using a Si detector for {alpha} particles and a 25% Ge detector for {gamma} rays. A gamma-gamma coincidence measurement was performed with the Gammasphere spectrometer. The Es sample was obtained by extracting the 253Es which grew in a 253Cf source material produced in the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory. Additional information on the 249Bk levels was obtained from the study of {gamma} rays produced in the {beta}- decay of 249Cm. The 249Cm sample was produced by neutron irradiation of 248Cm. Using the results of the present study and the results of previous 248Cm({alpha},t) and 248Cm(3He,d) reaction spectra, the following single-particle states have been identified in 249Bk: 7/2+[633], 0.0 keV; 3/2-[521], 8.78 keV; 1/2+[400], 377.55 keV: 5/2+[642], 389.17 keV; 1/2-[530], 569.19 keV; 1/2-[521], 643.0 keV; 5/2-[523], 672.8 keV; 9/2+[624], 1075.1 keV. Four vibrational bands were identified at 767.9, 932.2, 1150.7 and 1223.0 keV with tentative assignments of {l_brace}7/2+[633]x1-{r_brace}9/2-, {l_brace}7/2+[633]x0-{r_brace}7/2-, {l_brace}7/2+[633]x1-{r_brace}5/2- and {l_brace}7/2+[633]x0+{r_brace}7/2+, respectively.
- Authors:
-
- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Publication Date:
- OSTI Identifier:
- 20630848
- Resource Type:
- Journal Article
- Journal Name:
- AIP Conference Proceedings
- Additional Journal Information:
- Journal Volume: 764; Journal Issue: 1; Conference: Conference on nuclei at the limits, Argonne, IL (United States), 26-30 Jul 2004; Other Information: DOI: 10.1063/1.1905319; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALPHA DECAY; ALPHA PARTICLES; BERKELIUM 249; BETA DECAY; CALIFORNIUM 253; CURIUM 248; CURIUM 249; EINSTEINIUM 253; GAMMA RADIATION; GAMMA SPECTRA; GE SEMICONDUCTOR DETECTORS; HFIR REACTOR; KEV RANGE; NEUTRON REACTIONS; NEUTRONS; ORNL; PROTONS; SINGLE-PARTICLE MODEL; VIBRATIONAL STATES
Citation Formats
Ahmad, I, Kondev, F G, Moore, E F, Chasman, R R, Carpenter, M P, Greene, J P, Janssens, R V.F., Lauritsen, T, Lister, C J, Seweryniak, D, Hoff, R W, Evans, J E, Lougheed, R W, Porter, C E, and Felker, L K. Proton Single-Particle States In The Heaviest Actinide Nuclei. United States: N. p., 2005.
Web. doi:10.1063/1.1905319.
Ahmad, I, Kondev, F G, Moore, E F, Chasman, R R, Carpenter, M P, Greene, J P, Janssens, R V.F., Lauritsen, T, Lister, C J, Seweryniak, D, Hoff, R W, Evans, J E, Lougheed, R W, Porter, C E, & Felker, L K. Proton Single-Particle States In The Heaviest Actinide Nuclei. United States. https://doi.org/10.1063/1.1905319
Ahmad, I, Kondev, F G, Moore, E F, Chasman, R R, Carpenter, M P, Greene, J P, Janssens, R V.F., Lauritsen, T, Lister, C J, Seweryniak, D, Hoff, R W, Evans, J E, Lougheed, R W, Porter, C E, and Felker, L K. 2005.
"Proton Single-Particle States In The Heaviest Actinide Nuclei". United States. https://doi.org/10.1063/1.1905319.
@article{osti_20630848,
title = {Proton Single-Particle States In The Heaviest Actinide Nuclei},
author = {Ahmad, I and Kondev, F G and Moore, E F and Chasman, R R and Carpenter, M P and Greene, J P and Janssens, R V.F. and Lauritsen, T and Lister, C J and Seweryniak, D and Hoff, R W and Evans, J E and Lougheed, R W and Porter, C E and Felker, L K},
abstractNote = {The level structure of 249Bk has been investigated by measuring the {gamma}-ray spectra following the {alpha} decay of a chemically and isotopically pure 253Es sample. Alpha-gamma coincidence measurement was performed using a Si detector for {alpha} particles and a 25% Ge detector for {gamma} rays. A gamma-gamma coincidence measurement was performed with the Gammasphere spectrometer. The Es sample was obtained by extracting the 253Es which grew in a 253Cf source material produced in the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory. Additional information on the 249Bk levels was obtained from the study of {gamma} rays produced in the {beta}- decay of 249Cm. The 249Cm sample was produced by neutron irradiation of 248Cm. Using the results of the present study and the results of previous 248Cm({alpha},t) and 248Cm(3He,d) reaction spectra, the following single-particle states have been identified in 249Bk: 7/2+[633], 0.0 keV; 3/2-[521], 8.78 keV; 1/2+[400], 377.55 keV: 5/2+[642], 389.17 keV; 1/2-[530], 569.19 keV; 1/2-[521], 643.0 keV; 5/2-[523], 672.8 keV; 9/2+[624], 1075.1 keV. Four vibrational bands were identified at 767.9, 932.2, 1150.7 and 1223.0 keV with tentative assignments of {l_brace}7/2+[633]x1-{r_brace}9/2-, {l_brace}7/2+[633]x0-{r_brace}7/2-, {l_brace}7/2+[633]x1-{r_brace}5/2- and {l_brace}7/2+[633]x0+{r_brace}7/2+, respectively.},
doi = {10.1063/1.1905319},
url = {https://www.osti.gov/biblio/20630848},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 764,
place = {United States},
year = {Tue Apr 05 00:00:00 EDT 2005},
month = {Tue Apr 05 00:00:00 EDT 2005}
}