skip to main content


This content will become publicly available on April 16, 2019

Title: Intruder configurations of excited states in the neutron-rich isotopes P 33 and P 34

Excited states in the neutron-rich isotopes 33P and 34P were populated by the 18O+ 18O fusion-evaporation reaction at E lab = 24 MeV. The Gammasphere array was used along with the Microball particle detector array to detect γ transitions in coincidence with the charged particles emitted from the compound nucleus 36S. The use of Microball enabled the selection of the proton emission channel. It also helped in determining the exact position and energy of the emitted proton; this was later employed in kinematic Doppler corrections. 16 new transitions and 13 new states were observed in 33P and 21 γ rays and 20 energy levels were observed in 34P for the first time. The nearly 4π geometry of Gammasphere allowed the measurement of γ-ray angular distributions leading to spin assignments for many states. The experimental observations for both isotopes were interpreted with the help of shell-model calculations using the (0+1) $$ \overline{h}\ $$ω PSDPF interaction. Furthermore, the calculations accounted for both the 0p-0h and 1p-1h states reasonably well and indicated that 2p-2h excitations might dominate the higher-spin configurations in both 33P and 34P.
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [5] ;  [5] ;  [5] ;  [5] ;  [5] ;  [6] ;  [6] ;  [6] ;  [6] ;  [6] ;  [7] more »;  [7] « less
  1. Florida State Univ., Tallahassee, FL (United States)
  2. Florida State Univ., Tallahassee, FL (United States); Univ. of Massachusetts, Lowell, MA (United States)
  3. Univ. Labri Tebessa, Tebessa (Algeria)
  4. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States); U.S. Army Research Lab., Adelphi, MD (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  7. Washington Univ., St. Louis, MO (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231; SC0009883; AC02-05CH-11231; AC02-06CH-1137; FG02-88ER-40406; FG02-94ER-40834
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 97; Journal Issue: 4; Related Information: © 2018 American Physical Society.; Journal ID: ISSN 2469-9985
American Physical Society (APS)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1433277