Isomeric Character of the Lowest Observed 4+ State in S44

Parker, J. J.; Wiedenhöver, I.; Cottle, P. D.; Baker, J.; McPherson, D.; Riley, M. A.; Santiago-Gonzalez, D.; Volya, A.; Bader, V. M.; Baugher, T.; Bazin, D.; Gade, A.; Ginter, T.; Iwasaki, H.; Loelius, C.; Morse, C.; Recchia, F.; Smalley, D.; Stroberg, S. R.; Whitmore, K.; Weisshaar, D.; Lemasson, A.; Crawford, H. L.; Macchiavelli, A. O.; Wimmer, K.

doi:10.1103/PhysRevLett.118.052501

Title: Isomeric Character of the Lowest Observed $4^{+}$ State in ${}^{44}S$

Abstract

Previous experiments observed a 4⁺ state in the N=28 nucleus S⁴⁴ and suggested that this state may exhibit a hindered E2-decay rate, inconsistent with being a member of the collective ground state band. We populate this state via two-proton knockout from a beam of exotic Ar⁴⁶ projectiles and measure its lifetime using the recoil distance method with the GRETINA γ-ray spectrometer. The result, 76(14)_stat(20)_syst ps, implies a hindered transition of B(E2;4⁺→2$$+\atop{1}$$)=0.61(19) single-particle or Weisskopf units strength and supports the interpretation of the 4⁺ state as a K=4 isomer, the first example of a high-K isomer in a nucleus of such low mass.

Authors:

Parker, J. J. ^[1]; Wiedenhöver, I. ^[1]; Cottle, P. D. ^[1]; Baker, J. ^[1]; McPherson, D. ^[1]; Riley, M. A. ^[1]; Santiago-Gonzalez, D. ^[1]; Volya, A. ^[1]; Bader, V. M. ^[2]; Baugher, T. ^[2]; Bazin, D. ^[3]; Gade, A. ^[2]; Ginter, T. ^[3]; Iwasaki, H. ^[2]; Loelius, C. ^[2]; Morse, C. ^[2]; Recchia, F. ^[3]; Smalley, D. ^[3]; Stroberg, S. R. ^[2]; Whitmore, K. ^[2] more »

Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab., Dept. of Physics and Astronomy
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
National Heavy Ion Accelerator (GANIL), Caen (France)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Central Michigan Univ., Mount Pleasant, MI (United States). Dept. of Physics

Publication Date:: Tue Jan 31 00:00:00 EST 2017

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1379702

Alternate Identifier(s):: OSTI ID: 1341936

Grant/Contract Number:: AC02-05CH11231; NA0000979; PHY-1064819; PHY-1401574; PHY-1102511

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 118; Journal Issue: 5; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Parker, J. J., Wiedenhöver, I., Cottle, P. D., Baker, J., McPherson, D., Riley, M. A., Santiago-Gonzalez, D., Volya, A., Bader, V. M., Baugher, T., Bazin, D., Gade, A., Ginter, T., Iwasaki, H., Loelius, C., Morse, C., Recchia, F., Smalley, D., Stroberg, S. R., Whitmore, K., Weisshaar, D., Lemasson, A., Crawford, H. L., Macchiavelli, A. O., and Wimmer, K. Isomeric Character of the Lowest Observed 4+ State in S44.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevLett.118.052501.

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                    Parker, J. J., Wiedenhöver, I., Cottle, P. D., Baker, J., McPherson, D., Riley, M. A., Santiago-Gonzalez, D., Volya, A., Bader, V. M., Baugher, T., Bazin, D., Gade, A., Ginter, T., Iwasaki, H., Loelius, C., Morse, C., Recchia, F., Smalley, D., Stroberg, S. R., Whitmore, K., Weisshaar, D., Lemasson, A., Crawford, H. L., Macchiavelli, A. O., & Wimmer, K. Isomeric Character of the Lowest Observed 4+ State in S44.  United States.  https://doi.org/10.1103/PhysRevLett.118.052501

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                    Parker, J. J., Wiedenhöver, I., Cottle, P. D., Baker, J., McPherson, D., Riley, M. A., Santiago-Gonzalez, D., Volya, A., Bader, V. M., Baugher, T., Bazin, D., Gade, A., Ginter, T., Iwasaki, H., Loelius, C., Morse, C., Recchia, F., Smalley, D., Stroberg, S. R., Whitmore, K., Weisshaar, D., Lemasson, A., Crawford, H. L., Macchiavelli, A. O., and Wimmer, K. Tue .  
"Isomeric Character of the Lowest Observed 4+ State in S44".  United States.  https://doi.org/10.1103/PhysRevLett.118.052501.  https://www.osti.gov/servlets/purl/1379702.

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@article{osti_1379702,

  title        = {Isomeric Character of the Lowest Observed 4+ State in S44},

  author       = {Parker, J. J. and Wiedenhöver, I. and Cottle, P. D. and Baker, J. and McPherson, D. and Riley, M. A. and Santiago-Gonzalez, D. and Volya, A. and Bader, V. M. and Baugher, T. and Bazin, D. and Gade, A. and Ginter, T. and Iwasaki, H. and Loelius, C. and Morse, C. and Recchia, F. and Smalley, D. and Stroberg, S. R. and Whitmore, K. and Weisshaar, D. and Lemasson, A. and Crawford, H. L. and Macchiavelli, A. O. and Wimmer, K.},

  abstractNote = {Previous experiments observed a 4+ state in the N=28 nucleus S44 and suggested that this state may exhibit a hindered E2-decay rate, inconsistent with being a member of the collective ground state band. We populate this state via two-proton knockout from a beam of exotic Ar46 projectiles and measure its lifetime using the recoil distance method with the GRETINA γ-ray spectrometer. The result, 76(14)stat(20)syst ps, implies a hindered transition of B(E2;4+→2$+\atop{1}$)=0.61(19) single-particle or Weisskopf units strength and supports the interpretation of the 4+ state as a K=4 isomer, the first example of a high-K isomer in a nucleus of such low mass.},

  doi          = {10.1103/PhysRevLett.118.052501},

  journal      = {Physical Review Letters},

  number       = 5,

  volume       = 118,

  place        = {United States},

  year         = {Tue Jan 31 00:00:00 EST 2017},

  month        = {Tue Jan 31 00:00:00 EST 2017}

}

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Works referenced in this record:

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$γ$ -ray spectroscopy of one-proton knockout from $^{45}$ Cl
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Works referencing / citing this record:

Inverse-kinematics proton scattering from ${}^{42, 44}S, {}^{41, 43}P$ , and the collapse of the $N = 28$ major shell closure
journal, October 2019

Riley, L. A.; Bazin, D.; Belarge, J.
Physical Review C, Vol. 100, Issue 4
DOI: 10.1103/physrevc.100.044312

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Similar Records

Title: Isomeric Character of the Lowest Observed 4 + State in S 44

Abstract

Citation Formats

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

Configuration mixing description of the nucleus 44 S journal, November 2011

Shell model structure of 43 S and 44 S re-examined journal, May 2014

High- K isomerism in rotational nuclei journal, December 2015

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

The performance of the Gamma-Ray Energy Tracking In-beam Nuclear Array GRETINA journal, May 2013

Observation of the 0+2 state in 44S journal, July 2005

Collective and Single-Particle Motion in Beyond Mean Field Approaches journal, February 2016

The TRIple PLunger for EXotic beams TRIPLEX for excited-state lifetime measurement studies on rare isotopes journal, January 2016

Shape transitions in exotic Si and S isotopes and tensor-force-driven Jahn-Teller effect journal, November 2012

In-beam spectroscopic studies of the 44 S nucleus journal, February 2012

γ -ray spectroscopy of one-proton knockout from 45 Cl journal, October 2012

Collectivity in 44S journal, March 1997

A simulation tool for Recoil Distance Method lifetime measurements at NSCL journal, January 2009

Nature of Isomerism in Exotic Sulfur Isotopes journal, January 2015

Triple configuration coexistence in S 44 journal, June 2011

Prolate-Spherical Shape Coexistence at N = 28 in S 44 journal, September 2010

Inverse-kinematics proton scattering from S 42 , 44 , P 41 , 43 , and the collapse of the N = 28 major shell closure journal, October 2019

Title: Isomeric Character of the Lowest Observed $4^{+}$ State in ${}^{44}S$

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

Configuration mixing description of the nucleus $^{44}$ S
journal, November 2011

Shell model structure of $^{43} S$ and $^{44} S$ re-examined
journal, May 2014

High- K isomerism in rotational nuclei
journal, December 2015

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

The performance of the Gamma-Ray Energy Tracking In-beam Nuclear Array GRETINA
journal, May 2013

Observation of the 0+2 state in 44S
journal, July 2005

Collective and Single-Particle Motion in Beyond Mean Field Approaches
journal, February 2016

The TRIple PLunger for EXotic beams TRIPLEX for excited-state lifetime measurement studies on rare isotopes
journal, January 2016

Shape transitions in exotic Si and S isotopes and tensor-force-driven Jahn-Teller effect
journal, November 2012

In-beam spectroscopic studies of the $^{44}$ S nucleus
journal, February 2012

$γ$ -ray spectroscopy of one-proton knockout from $^{45}$ Cl
journal, October 2012

Collectivity in 44S
journal, March 1997

A simulation tool for Recoil Distance Method lifetime measurements at NSCL
journal, January 2009

Nature of Isomerism in Exotic Sulfur Isotopes
journal, January 2015

Triple configuration coexistence in ${}^{44}S$
journal, June 2011

Prolate-Spherical Shape Coexistence at $N = 28$ in ${}^{44}S$
journal, September 2010

Inverse-kinematics proton scattering from ${}^{42, 44}S, {}^{41, 43}P$ , and the collapse of the $N = 28$ major shell closure
journal, October 2019