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Title: Well Developed Deformation in Si 42

Abstract

For this research, excited states in 38,40,42Si nuclei have been studied via in-beam γ-ray spectroscopy with multinucleon removal reactions. Intense radioactive beams of 40S and 44S provided at the new facility of the RIKEN Radioactive Isotope Beam Factory enabled γ-γ coincidence measurements. A prominent γ line observed with an energy of 742(8) keV in 42Si confirms the 2+ state reported in an earlier study. Among the γ lines observed in coincidence with the 2+ → 0+ transition, the most probable candidate for the transition from the yrast 4+ state was identified, leading to a 41+ energy of 2173(14) keV. The energy ratio of 2.93(5) between the 21+ and 41+ states indicates well-developed deformation in 42Si at N = 28 and Z = 1 . Also for 38,40Si energy ratios with values of 2.09(5) and 2.56(5) were obtained. Finally, together with the ratio for 42Si, the results show a rapid deformation development of Si isotopes from N = 24 to N = 28.

Authors:
 [1];  [2];  [1];  [1];  [3];  [1];  [1];  [1];  [3];  [1];  [4];  [5];  [6];  [6];  [7];  [8];  [9];  [5];  [7];  [10] more »;  [11];  [9];  [12];  [13];  [13];  [7];  [14];  [1];  [13];  [15];  [9];  [13];  [9];  [6];  [13];  [1];  [9];  [7];  [13];  [1];  [1];  [4];  [1] « less
  1. RIKEN Nishina Center, Wako (Japan)
  2. RIKEN Nishina Center, Wako (Japan); Rikkyo University, Toshima (Japan). Department of Physics
  3. RIKEN Nishina Center, Wako (Japan); Peking University, Beijing (China)
  4. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory
  5. Grand Accelerateur National d Ions Lourds, CEA/DSM-CNRS/IN2P3 (France)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  7. Technische Universitat Munchen (Germany). Physik Dept.
  8. LPC-ENSICAEN, IN2P3-CNRS et Universite de Caen (France)
  9. University of Tokyo, RIKEN campus (Japan). Center for Nuclear Study
  10. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
  11. University of Richmond, VA (United States). Department of Physics
  12. University of York, Heslington (United Kingdom). Physics Dept.
  13. Tokyo Institute of Technology (Japan). Department of Physics
  14. Institut fur Kernphysik, Johann-Wolfgang-Goethe-Universitat (Germany); GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  15. Institut de Physique Nucleaire, IN2P3-CNRS, Universite de Paris Sud (France)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1407164
Alternate Identifier(s):
OSTI ID: 1101719
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 109; Journal Issue: 18; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 07 ISOTOPE AND RADIATION SOURCES

Citation Formats

Takeuchi, S., Matsushita, M., Aoi, N., Doornenbal, P., Li, K., Motobayashi, T., Scheit, H., Steppenbeck, D., Wang, H., Baba, H., Bazin, D., Càceres, L., Crawford, H., Fallon, P., Gernhäuser, R., Gibelin, J., Go, S., Grévy, S., Hinke, C., Hoffman, C. R., Hughes, R., Ideguchi, E., Jenkins, D., Kobayashi, N., Kondo, Y., Krücken, R., Le Bleis, T., Lee, J., Lee, G., Matta, A., Michimasa, S., Nakamura, T., Ota, S., Petri, M., Sako, T., Sakurai, H., Shimoura, S., Steiger, K., Takahashi, K., Takechi, M., Togano, Y., Winkler, R., and Yoneda, K. Well Developed Deformation in Si42. United States: N. p., 2012. Web. doi:10.1103/PhysRevLett.109.182501.
Takeuchi, S., Matsushita, M., Aoi, N., Doornenbal, P., Li, K., Motobayashi, T., Scheit, H., Steppenbeck, D., Wang, H., Baba, H., Bazin, D., Càceres, L., Crawford, H., Fallon, P., Gernhäuser, R., Gibelin, J., Go, S., Grévy, S., Hinke, C., Hoffman, C. R., Hughes, R., Ideguchi, E., Jenkins, D., Kobayashi, N., Kondo, Y., Krücken, R., Le Bleis, T., Lee, J., Lee, G., Matta, A., Michimasa, S., Nakamura, T., Ota, S., Petri, M., Sako, T., Sakurai, H., Shimoura, S., Steiger, K., Takahashi, K., Takechi, M., Togano, Y., Winkler, R., & Yoneda, K. Well Developed Deformation in Si42. United States. doi:10.1103/PhysRevLett.109.182501.
Takeuchi, S., Matsushita, M., Aoi, N., Doornenbal, P., Li, K., Motobayashi, T., Scheit, H., Steppenbeck, D., Wang, H., Baba, H., Bazin, D., Càceres, L., Crawford, H., Fallon, P., Gernhäuser, R., Gibelin, J., Go, S., Grévy, S., Hinke, C., Hoffman, C. R., Hughes, R., Ideguchi, E., Jenkins, D., Kobayashi, N., Kondo, Y., Krücken, R., Le Bleis, T., Lee, J., Lee, G., Matta, A., Michimasa, S., Nakamura, T., Ota, S., Petri, M., Sako, T., Sakurai, H., Shimoura, S., Steiger, K., Takahashi, K., Takechi, M., Togano, Y., Winkler, R., and Yoneda, K. Thu . "Well Developed Deformation in Si42". United States. doi:10.1103/PhysRevLett.109.182501. https://www.osti.gov/servlets/purl/1407164.
@article{osti_1407164,
title = {Well Developed Deformation in Si42},
author = {Takeuchi, S. and Matsushita, M. and Aoi, N. and Doornenbal, P. and Li, K. and Motobayashi, T. and Scheit, H. and Steppenbeck, D. and Wang, H. and Baba, H. and Bazin, D. and Càceres, L. and Crawford, H. and Fallon, P. and Gernhäuser, R. and Gibelin, J. and Go, S. and Grévy, S. and Hinke, C. and Hoffman, C. R. and Hughes, R. and Ideguchi, E. and Jenkins, D. and Kobayashi, N. and Kondo, Y. and Krücken, R. and Le Bleis, T. and Lee, J. and Lee, G. and Matta, A. and Michimasa, S. and Nakamura, T. and Ota, S. and Petri, M. and Sako, T. and Sakurai, H. and Shimoura, S. and Steiger, K. and Takahashi, K. and Takechi, M. and Togano, Y. and Winkler, R. and Yoneda, K.},
abstractNote = {For this research, excited states in 38,40,42Si nuclei have been studied via in-beam γ-ray spectroscopy with multinucleon removal reactions. Intense radioactive beams of 40S and 44S provided at the new facility of the RIKEN Radioactive Isotope Beam Factory enabled γ-γ coincidence measurements. A prominent γ line observed with an energy of 742(8) keV in 42Si confirms the 2+ state reported in an earlier study. Among the γ lines observed in coincidence with the 2+ → 0+ transition, the most probable candidate for the transition from the yrast 4+ state was identified, leading to a 41+ energy of 2173(14) keV. The energy ratio of 2.93(5) between the 21+ and 41+ states indicates well-developed deformation in 42Si at N = 28 and Z = 1 . Also for 38,40Si energy ratios with values of 2.09(5) and 2.56(5) were obtained. Finally, together with the ratio for 42Si, the results show a rapid deformation development of Si isotopes from N = 24 to N = 28.},
doi = {10.1103/PhysRevLett.109.182501},
journal = {Physical Review Letters},
number = 18,
volume = 109,
place = {United States},
year = {2012},
month = {11}
}

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