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Title: Population and decay of a K π = 8 two-quasineutron isomer in Pu 244

Abstract

Here, the decay of a K π = 8 isomer in 244Pu and the collective band structures populating the isomer were studied using deep inelastic excitations with 47Ti and 208Pb beams, respectively. Precise measurements of M1/E2 branching ratios in the band confirm a 9/2 [734] νⓍ7/2 +[624] ν configuration assignment for the isomer, validating the systematics of K π = 8 , two-quasineutron isomers observed in even-Z, N = 150 isotones. These isomers around the deformed shell gap at N = 152 provide critical benchmarks for theoretical predictions of single-particle energies in this gateway region to superheavy nuclei.

Authors:
 [1];  [2];  [3];  [4];  [4];  [5];  [4];  [4];  [3];  [4];  [4];  [4];  [4];  [6];  [7];  [4];  [8];  [9];  [3];  [4] more »;  [6];  [10];  [10];  [11];  [4] « less
  1. Univ. of Massachusetts, Lowell, MA (United States); Australian National Univ., Canberra, ACT (Australia)
  2. Univ. of Massachusetts, Lowell, MA (United States); UM-DAE Centre for Excellence in Basic Sciences, Mumbai (India)
  3. Univ. of Massachusetts, Lowell, MA (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States); Univ. of Sofia, Sofia (Bulgaria); Ames Research Lab., Adelphi, MD (United States)
  6. Univ. of Massachusetts, Lowell, MA (United States); Radiation Monitoring Devices, Inc., Watertown, MA (United States)
  7. Univ. of Sofia, Sofia (Bulgaria)
  8. Univ. of Massachusetts, Lowell, MA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  9. Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  10. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States)
  11. Japan Atomic Energy Agency, Ibaraki (Japan)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
OSTI Identifier:
1339580
Alternate Identifier(s):
OSTI ID: 1328619
Grant/Contract Number:
AC02-06CH11357; FG02-94ER40848; FG02-94ER40834
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 94; Journal Issue: 2; Journal ID: ISSN 2469-9985
Publisher:
APS
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Hota, S. S., Tandel, S. K., Chowdhury, P., Ahmad, I., Carpenter, M. P., Chiara, C. J., Greene, J. P., Hoffman, C. R., Jackson, E. G., Janssens, R. V. F., Kay, B. P., Khoo, T. L., Kondev, F. G., Lakshmi, S., Lalkovski, S., Lauritsen, T., Lister, C. J., McCutchan, E. A., Moran, K., Peterson, D., Shirwadkar, U., Seweryniak, D., Stefanescu, I., Toh, Y., and Zhu, S. Population and decay of a Kπ=8– two-quasineutron isomer in Pu244. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.94.021303.
Hota, S. S., Tandel, S. K., Chowdhury, P., Ahmad, I., Carpenter, M. P., Chiara, C. J., Greene, J. P., Hoffman, C. R., Jackson, E. G., Janssens, R. V. F., Kay, B. P., Khoo, T. L., Kondev, F. G., Lakshmi, S., Lalkovski, S., Lauritsen, T., Lister, C. J., McCutchan, E. A., Moran, K., Peterson, D., Shirwadkar, U., Seweryniak, D., Stefanescu, I., Toh, Y., & Zhu, S. Population and decay of a Kπ=8– two-quasineutron isomer in Pu244. United States. doi:10.1103/PhysRevC.94.021303.
Hota, S. S., Tandel, S. K., Chowdhury, P., Ahmad, I., Carpenter, M. P., Chiara, C. J., Greene, J. P., Hoffman, C. R., Jackson, E. G., Janssens, R. V. F., Kay, B. P., Khoo, T. L., Kondev, F. G., Lakshmi, S., Lalkovski, S., Lauritsen, T., Lister, C. J., McCutchan, E. A., Moran, K., Peterson, D., Shirwadkar, U., Seweryniak, D., Stefanescu, I., Toh, Y., and Zhu, S. Mon . "Population and decay of a Kπ=8– two-quasineutron isomer in Pu244". United States. doi:10.1103/PhysRevC.94.021303. https://www.osti.gov/servlets/purl/1339580.
@article{osti_1339580,
title = {Population and decay of a Kπ=8– two-quasineutron isomer in Pu244},
author = {Hota, S. S. and Tandel, S. K. and Chowdhury, P. and Ahmad, I. and Carpenter, M. P. and Chiara, C. J. and Greene, J. P. and Hoffman, C. R. and Jackson, E. G. and Janssens, R. V. F. and Kay, B. P. and Khoo, T. L. and Kondev, F. G. and Lakshmi, S. and Lalkovski, S. and Lauritsen, T. and Lister, C. J. and McCutchan, E. A. and Moran, K. and Peterson, D. and Shirwadkar, U. and Seweryniak, D. and Stefanescu, I. and Toh, Y. and Zhu, S.},
abstractNote = {Here, the decay of a Kπ = 8– isomer in 244Pu and the collective band structures populating the isomer were studied using deep inelastic excitations with 47Ti and 208Pb beams, respectively. Precise measurements of M1/E2 branching ratios in the band confirm a 9/2–[734]νⓍ7/2+[624]ν configuration assignment for the isomer, validating the systematics of Kπ = 8–, two-quasineutron isomers observed in even-Z, N = 150 isotones. These isomers around the deformed shell gap at N = 152 provide critical benchmarks for theoretical predictions of single-particle energies in this gateway region to superheavy nuclei.},
doi = {10.1103/PhysRevC.94.021303},
journal = {Physical Review C},
number = 2,
volume = 94,
place = {United States},
year = {Mon Aug 22 00:00:00 EDT 2016},
month = {Mon Aug 22 00:00:00 EDT 2016}
}

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