Well Developed Deformation in Si42

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.

doi:10.1103/PhysRevLett.109.182501

Title: Well Developed Deformation in ${}^{42}{Si}$

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:

Takeuchi, S. ^[1]; Matsushita, M. ^[2]; Aoi, N. ^[1]; Doornenbal, P. ^[1]; Li, K. ^[3]; Motobayashi, T. ^[1]; Scheit, H. ^[1]; Steppenbeck, D. ^[1]; Wang, H. ^[3]; Baba, H. ^[1]; Bazin, D. ^[4]; Càceres, L. ^[5]; Crawford, H. ^[6]; Fallon, P. ^[6]; Gernhäuser, R. ^[7]; Gibelin, J. ^[8]; Go, S. ^[9]; Grévy, S. ^[5]; Hinke, C. ^[7]; Hoffman, C. R. ^[10] more »

RIKEN Nishina Center, Wako (Japan)
RIKEN Nishina Center, Wako (Japan); Rikkyo University, Toshima (Japan). Department of Physics
RIKEN Nishina Center, Wako (Japan); Peking University, Beijing (China)
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory
Grand Accelerateur National d Ions Lourds, CEA/DSM-CNRS/IN2P3 (France)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Technische Universitat Munchen (Germany). Physik Dept.
LPC-ENSICAEN, IN2P3-CNRS et Universite de Caen (France)
University of Tokyo, RIKEN campus (Japan). Center for Nuclear Study
Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
University of Richmond, VA (United States). Department of Physics
University of York, Heslington (United Kingdom). Physics Dept.
Tokyo Institute of Technology (Japan). Department of Physics
Institut fur Kernphysik, Johann-Wolfgang-Goethe-Universitat (Germany); GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
Institut de Physique Nucleaire, IN2P3-CNRS, Universite de Paris Sud (France)

Publication Date:: Thu Nov 01 00:00:00 EDT 2012

Research Org.:: Lawrence Berkeley National Laboratory (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.

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                    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.  https://doi.org/10.1103/PhysRevLett.109.182501

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                    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.  https://doi.org/10.1103/PhysRevLett.109.182501.  https://www.osti.gov/servlets/purl/1407164.

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@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         = {Thu Nov 01 00:00:00 EDT 2012},

  month        = {Thu Nov 01 00:00:00 EDT 2012}

}

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Title: Well Developed Deformation in Si 42

Abstract

Citation Formats

New Region of Deformation: The Neutron-Rich Sulfur Isotopes journal, November 1996

Quadrupole deformation of 12Be studied by proton inelastic scattering journal, May 2000

Low-lying intruder 1− state in 12Be and the melting of the N=8 shell closure journal, October 2000

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Large deformation of the very neutron-rich nucleus 32Mg from intermediate-energy Coulomb excitation journal, March 1995

Quadrupole Collectivity in 3 2 , 3 4 , 3 6 , 3 8 Si and the N = 20 Shell Closure journal, March 1998

Beta decay of Na 2 7 − 3 2 and their descendants journal, January 1979

Decay properties of exotic N ≃28 S and Cl nuclei and the Ca 48 / 46 Ca abundance ratio journal, June 1993

Energy density functional analysis of shape evolution in N = 28 isotones journal, November 2011

In-Beam Gamma Spectroscopy of Very Neutron-rich Nuclei at GANIL journal, January 2000

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Quadrupole collectivity in silicon isotopes approaching neutron number journal, August 2007

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Title: Well Developed Deformation in ${}^{42}{Si}$

New Region of Deformation: The Neutron-Rich Sulfur Isotopes
journal, November 1996

Quadrupole deformation of 12Be studied by proton inelastic scattering
journal, May 2000

Low-lying intruder 1− state in 12Be and the melting of the N=8 shell closure
journal, October 2000

Study of the neutron-rich nucleus ${}^{36}{Si}$
journal, July 2006

Large deformation of the very neutron-rich nucleus 32Mg from intermediate-energy Coulomb excitation
journal, March 1995

Quadrupole Collectivity in $^{32, 34, 36, 38} Si$ and the $N = 20$ Shell Closure
journal, March 1998

Beta decay of ${}^{27 - 32}{Na}$ and their descendants
journal, January 1979

Decay properties of exotic N ≃28 S and Cl nuclei and the ${}^{48}{Ca}$ $/^{46}$ Ca abundance ratio
journal, June 1993

Energy density functional analysis of shape evolution in $N = 28$ isotones
journal, November 2011

In-Beam Gamma Spectroscopy of Very Neutron-rich Nuclei at GANIL
journal, January 2000

In-flight RI beam separator BigRIPS at RIKEN and elsewhere in Japan
journal, May 2003

Quadrupole collectivity in silicon isotopes approaching neutron number
journal, August 2007

Shell structure at $N = 28$ near the dripline: Spectroscopy of ${}^{42}{Si}$ , ${}^{43}P$ , and ${}^{44}S$
journal, September 2006

Collectivity in 44S
journal, March 1997

Direct Evidence for the Breakdown of the $N = 8$ Shell Closure in ${}^{12}B e$
journal, July 2000

Collapse of the $N = 28$ Shell Closure in ${}^{42}S i$
journal, July 2007

Beta-decay half-lives at the N=28 shell closure
journal, August 2004

Unveiling the Intruder Deformed $0_{2}^{+}$ State in ${}^{34}{Si}$
journal, August 2012

‘Magic’ nucleus 42Si
journal, June 2005

Exotic Nuclei and Yukawa's Forces
journal, June 2008

Delay-line PPAC for high-energy light ions
journal, September 2001

Geant4—a simulation toolkit
journal, July 2003

β-Decay schemes of very neutron-rich sodium isotopes and their descendants
journal, September 1984

Low-lying states in ${}^{32}{Mg}$ studied by proton inelastic scattering
journal, May 2009

Measurement of Excited States in ${}^{40}{Si}$ and Evidence for Weakening of the $N = 28$ Shell Gap
journal, September 2006

Spectroscopy of ${}^{32}{Ne}$ and the “Island of Inversion”
journal, July 2009

New effective interaction for $0 ℏ ω$ shell-model calculations in the $sd − pf$ valence space
journal, January 2009

Transition Probability from the Ground to the First-Excited 2+ State of Even–Even Nuclides
journal, May 2001

Two-proton knockout from ${}^{32}{Mg}$ : Intruder amplitudes in ${}^{30}{Ne}$ and implications for the binding of ${}^{29, 31}F$
journal, April 2010

Deformation of 34Mg studied via in-beam γ-ray spectroscopy using radioactive-ion projectile fragmentation
journal, February 2001

Mass systematics for A =29–44 nuclei: The deformed A ∼32 region
journal, March 1990

State-of-the-art of beyond mean field theories with nuclear density functionals
journal, June 2016

Shape coexistence in neutron-rich nuclei
journal, January 2016

Proton-neutron force and proton single-particle strength in Sc, F, and Li isotopes
journal, August 2019

Collectivity evolution in the neutron-rich Pd isotopes toward the $N = 82$ shell closure
journal, November 2013

Excitation energies in neutron-rich rare isotopes as indicators of changing shell structure
journal, September 2015

Antisymmetrized molecular dynamics studies for exotic clustering phenomena in neutron-rich nuclei
journal, December 2016

Nuclear structure from direct reactions with rare isotopes: observables, methods and highlights
journal, September 2016

A study of shell structure in normal to exotic nuclides within relativistic Hartree–Bogoliubov approximation
journal, January 2019

Properties of exotic nuclei and their linkage to the nucleonic interaction
text, January 2019