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

Abstract

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.

Authors:
 [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:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1462974
Alternate Identifier(s):
OSTI ID: 1433277
Grant/Contract Number:  
AC02-05CH11231; SC0009883; AC02-06CH1137; FG02-88ER40406; FG02-94ER40834
Resource Type:
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
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Lubna, Rebeka Sultana, Tripathi, Vandana, Tabor, S. L., Tai, P. -L., Kravvaris, K., Bender, P. C., Volya, A., Bouhelal, M., Chiara, C. J., Carpenter, M. P., Janssens, R. V. F., Lauritsen, T., McCutchan, E. A., Zhu, S., Clark, R. M., Fallon, P., Macchiavelli, A. O., Paschalis, S., Petri, M., Reviol, W., and Sarantites, D. G. Intruder configurations of excited states in the neutron-rich isotopes P33 and P34. United States: N. p., 2018. Web. doi:10.1103/PhysRevC.97.044312.
Lubna, Rebeka Sultana, Tripathi, Vandana, Tabor, S. L., Tai, P. -L., Kravvaris, K., Bender, P. C., Volya, A., Bouhelal, M., Chiara, C. J., Carpenter, M. P., Janssens, R. V. F., Lauritsen, T., McCutchan, E. A., Zhu, S., Clark, R. M., Fallon, P., Macchiavelli, A. O., Paschalis, S., Petri, M., Reviol, W., & Sarantites, D. G. Intruder configurations of excited states in the neutron-rich isotopes P33 and P34. United States. doi:10.1103/PhysRevC.97.044312.
Lubna, Rebeka Sultana, Tripathi, Vandana, Tabor, S. L., Tai, P. -L., Kravvaris, K., Bender, P. C., Volya, A., Bouhelal, M., Chiara, C. J., Carpenter, M. P., Janssens, R. V. F., Lauritsen, T., McCutchan, E. A., Zhu, S., Clark, R. M., Fallon, P., Macchiavelli, A. O., Paschalis, S., Petri, M., Reviol, W., and Sarantites, D. G. Mon . "Intruder configurations of excited states in the neutron-rich isotopes P33 and P34". United States. doi:10.1103/PhysRevC.97.044312. https://www.osti.gov/servlets/purl/1462974.
@article{osti_1462974,
title = {Intruder configurations of excited states in the neutron-rich isotopes P33 and P34},
author = {Lubna, Rebeka Sultana and Tripathi, Vandana and Tabor, S. L. and Tai, P. -L. and Kravvaris, K. and Bender, P. C. and Volya, A. and Bouhelal, M. and Chiara, C. J. and Carpenter, M. P. and Janssens, R. V. F. and Lauritsen, T. and McCutchan, E. A. and Zhu, S. and Clark, R. M. and Fallon, P. and Macchiavelli, A. O. and Paschalis, S. and Petri, M. and Reviol, W. and Sarantites, D. G.},
abstractNote = {Excited states in the neutron-rich isotopes 33P and 34P were populated by the 18O+18O fusion-evaporation reaction at Elab = 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.},
doi = {10.1103/PhysRevC.97.044312},
journal = {Physical Review C},
number = 4,
volume = 97,
place = {United States},
year = {2018},
month = {4}
}

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