Prompt-delayed γ-ray spectroscopy of neutron-rich 119.121In isotopes

Biswas, S.; Lemasson, A.; Rejmund, M.; Navin, A.; Kim, Y. H.; Michelagnoli, C.; Stefan, I.; Banik, R.; Bednarczyk, P.; Bhattacharya, Soumik; Bhattacharyya, S.; Clément, E.; Crawford, H. L.; de France, G.; Fallon, P.; Frémont, G.; Goupil, J.; Jacquot, B.; Li, H. J.; Ljungvall, J.; Maj, A.; Ménager, L.; Morel, V.; Palit, R.; Pérez-Vidal, R. M.; Ropert, J.

doi:10.1103/physrevc.102.014326

Title: Prompt-delayed γ-ray spectroscopy of neutron-rich ^119.121In isotopes

Abstract

The Z = 50 shell closure, near N = 82, is unique in the sense that it is the only shell closure with the spin-orbit partner orbitals, $π g_{9 / 2}$ and $π g_{7 / 2}$ , enclosing the magic gap. The interaction of the proton hole/particle in the above-mentioned orbitals with neutrons in the νh_11/2 orbital is an important prerequisite to the understanding of the nuclear structure near N = 82 and the νπ interaction. To explore the structural similarity between the high-spin isomeric states in In (Z = 49), Sn (Z = 50), and Sb (Z = 51) isotopes from a microscopic point of view. In addition, to understand the role of a proton hole or particle in the spin-orbit partner orbitals, $π g_{9 / 2}$ and $π g_{7 / 2}$ , respectively, with neutron holes in the $ν h_{11 / 2}$ orbital on these aforementioned isomers. The fusion and transfer induced fission reaction ${}_{9}{Be} ({}_{238}U, f)$ with 6.2 MeV/u beam energy, using a unique setup consisting of AGATA, VAMOS++, and EXOGAM detectors, was used to populate through the fission process and study the neutron-rich ${}_{119, 121}{In}$ isotopes. This setup enabled the prompt-delayed $γ$ -ray spectroscopy of isotopes in the time range of $100 ns - 200 μ s$ . In the odd- $A {}_{119, 121}{In}$ isotopes, indications of a short half-life 19/2^- isomeric state, in addition to the previously known 25/2⁺ isomeric state, were observed from the present data. Further, new prompt transitions above the 25/2⁺ isomer in ${}_{121}{In}$ were identified along with reevaluation of its half-life. The experimental data were compared with the theoretical results obtained in the framework of large-scale shell-model calculations in a restricted model space. Furthermore, the $(π g_{9 / 2} ν h_{11 / 2}; I | \hat{H} | π g_{9 / 2} ν h_{11 / 2}; I)$ two-body matrix elements of residual interaction were modified to explain the excitation energies and the B(E2) transition probabilities in the neutron-rich In isotopes. The (i) decreasing trend of E (29/2⁺) - E (25/2⁺) in odd-In (with dominant configuration $π g_{9 / 2}^{- 1} ν h_{11 / 2}^{- 2}$ and maximum aligned spin of 29/2⁺) and (ii) increasing trend of E (27/2⁺) - E (23/2⁺) in odd-Sb (with dominant configuration $π g_{7 / 2}^{+ 1} ν h_{11 / 2}^{- 2}$ and maximum aligned spin of 27/2⁺) with increasing neutron number could be understood as a consequence of hole-hole and particle-hole interactions, respectively.

Authors:

Biswas, S. ^[1];

^[1]; Rejmund, M. ^[1]; Navin, A. ^[1]; Kim, Y. H. ^[2]; Michelagnoli, C. ^[2]; Stefan, I. ^[3]; Banik, R. ^[4]; Bednarczyk, P. ^[5]; Bhattacharya, Soumik ^[4]; Bhattacharyya, S. ^[4]; Clément, E. ^[1]; Crawford, H. L. ^[6]; de France, G. ^[1]; Fallon, P. ^[6]; Frémont, G. ^[1]; Goupil, J. ^[1]; Jacquot, B. ^[1]; Li, H. J. ^[1]; Ljungvall, J. ^[3] more »

Centre National de la Recherche Scientifique (CNRS), Caen (France). Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), Grand Accelerateur National d'Ions Lourds (GANIL)
Centre National de la Recherche Scientifique (CNRS), Caen (France). Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), Grand Accelerateur National d'Ions Lourds (GANIL); Inst. Laue-Langevin, Grenoble (France)
Univ. Paris-Saclay (France). IJCLab; Centre National de la Recherche Scientifique (CNRS), Paris (France). Inst. National de Physique Nucleaire et de Physique des Particules (IN2P3)
Variable Energy Cyclotron Centre, Kolkata (India); Homi Bhabha National Inst., Mumbai (India)
Inst. of Nuclear Physics (PAN), Krakow (Poland)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Tata Inst. of Fundamental Research, Mumbai (India)
Spanish National Research Council (CSIC) and Univ. of Valencia (Spain). Inst. de Fisica Corpuscular

Publication Date:: Wed Jul 29 00:00:00 EDT 2020

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

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); Polish National Science Centre (NCN); Ministry of Science, Spain

OSTI Identifier:: 1783105

Grant/Contract Number:: AC02-05CH11231; 2016/22/M/ST2/00269; BES-2012-061407; SEV-2014-0398; FPA2017-84756-C4

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 102; Journal Issue: 1; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Electromagnetic transitions; energy levels & level densities; isomer decays; lifetimes & widths; nuclear structure & decays; radiation detectors; shell model; spectrometers & spectroscopic techniques

Citation Formats


                    Biswas, S., Lemasson, A., Rejmund, M., Navin, A., Kim, Y. H., Michelagnoli, C., Stefan, I., Banik, R., Bednarczyk, P., Bhattacharya, Soumik, Bhattacharyya, S., Clément, E., Crawford, H. L., de France, G., Fallon, P., Frémont, G., Goupil, J., Jacquot, B., Li, H. J., Ljungvall, J., Maj, A., Ménager, L., Morel, V., Palit, R., Pérez-Vidal, R. M., and Ropert, J. Prompt-delayed γ-ray spectroscopy of neutron-rich 119.121In isotopes.  United States: N. p., 2020. 
Web.  doi:10.1103/physrevc.102.014326.

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                    Biswas, S., Lemasson, A., Rejmund, M., Navin, A., Kim, Y. H., Michelagnoli, C., Stefan, I., Banik, R., Bednarczyk, P., Bhattacharya, Soumik, Bhattacharyya, S., Clément, E., Crawford, H. L., de France, G., Fallon, P., Frémont, G., Goupil, J., Jacquot, B., Li, H. J., Ljungvall, J., Maj, A., Ménager, L., Morel, V., Palit, R., Pérez-Vidal, R. M., & Ropert, J. Prompt-delayed γ-ray spectroscopy of neutron-rich 119.121In isotopes.  United States.  https://doi.org/10.1103/physrevc.102.014326

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                    Biswas, S., Lemasson, A., Rejmund, M., Navin, A., Kim, Y. H., Michelagnoli, C., Stefan, I., Banik, R., Bednarczyk, P., Bhattacharya, Soumik, Bhattacharyya, S., Clément, E., Crawford, H. L., de France, G., Fallon, P., Frémont, G., Goupil, J., Jacquot, B., Li, H. J., Ljungvall, J., Maj, A., Ménager, L., Morel, V., Palit, R., Pérez-Vidal, R. M., and Ropert, J. Wed .  
"Prompt-delayed γ-ray spectroscopy of neutron-rich 119.121In isotopes".  United States.  https://doi.org/10.1103/physrevc.102.014326.  https://www.osti.gov/servlets/purl/1783105.

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@article{osti_1783105,

  title        = {Prompt-delayed γ-ray spectroscopy of neutron-rich 119.121In isotopes},

  author       = {Biswas, S. and Lemasson, A. and Rejmund, M. and Navin, A. and Kim, Y. H. and Michelagnoli, C. and Stefan, I. and Banik, R. and Bednarczyk, P. and Bhattacharya, Soumik and Bhattacharyya, S. and Clément, E. and Crawford, H. L. and de France, G. and Fallon, P. and Frémont, G. and Goupil, J. and Jacquot, B. and Li, H. J. and Ljungvall, J. and Maj, A. and Ménager, L. and Morel, V. and Palit, R. and Pérez-Vidal, R. M. and Ropert, J.},

  abstractNote = {The Z = 50 shell closure, near N = 82, is unique in the sense that it is the only shell closure with the spin-orbit partner orbitals, πg9/2 and πg7/2, enclosing the magic gap. The interaction of the proton hole/particle in the above-mentioned orbitals with neutrons in the νh11/2 orbital is an important prerequisite to the understanding of the nuclear structure near N = 82 and the νπ interaction. To explore the structural similarity between the high-spin isomeric states in In (Z = 49), Sn (Z = 50), and Sb (Z = 51) isotopes from a microscopic point of view. In addition, to understand the role of a proton hole or particle in the spin-orbit partner orbitals, πg9/2 and πg7/2, respectively, with neutron holes in the νh11/2 orbital on these aforementioned isomers. The fusion and transfer induced fission reaction Be9(U238, f) with 6.2 MeV/u beam energy, using a unique setup consisting of AGATA, VAMOS++, and EXOGAM detectors, was used to populate through the fission process and study the neutron-rich In119,121 isotopes. This setup enabled the prompt-delayed γ-ray spectroscopy of isotopes in the time range of 100ns–200μs. In the odd-AIn119,121 isotopes, indications of a short half-life 19/2- isomeric state, in addition to the previously known 25/2+ isomeric state, were observed from the present data. Further, new prompt transitions above the 25/2+ isomer in In121 were identified along with reevaluation of its half-life. The experimental data were compared with the theoretical results obtained in the framework of large-scale shell-model calculations in a restricted model space. Furthermore, the (πg9/2νh11/2;I|H^|πg9/2νh11/2;I) two-body matrix elements of residual interaction were modified to explain the excitation energies and the B(E2) transition probabilities in the neutron-rich In isotopes. The (i) decreasing trend of E (29/2+) - E (25/2+) in odd-In (with dominant configuration πg9/2-1νh11/2-2 and maximum aligned spin of 29/2+) and (ii) increasing trend of E (27/2+) - E (23/2+) in odd-Sb (with dominant configuration πg7/2+1νh11/2-2 and maximum aligned spin of 27/2+) with increasing neutron number could be understood as a consequence of hole-hole and particle-hole interactions, respectively.},

  doi          = {10.1103/physrevc.102.014326},

  journal      = {Physical Review C},

  number       = 1,

  volume       = 102,

  place        = {United States},

  year         = {Wed Jul 29 00:00:00 EDT 2020},

  month        = {Wed Jul 29 00:00:00 EDT 2020}

}

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Title: Prompt-delayed γ-ray spectroscopy of neutron-rich 119.121In isotopes

Abstract

Citation Formats

Prompt-delayed $\gamma$ γ -ray spectroscopy with AGATA, EXOGAM and VAMOS++ journal, August 2017

On Closed Shells in Nuclei. II journal, June 1949

Higher-seniority excitations in even neutron-rich Sn isotopes journal, April 2014

Observation of new microsecond isomers among fission products from in-flight fission of 345 MeV/nucleon 238 U journal, November 2012

Structure of the isomeric states in Sb 123 , 125 journal, November 2007

Decay of In 127 and In 129 journal, May 2004

Towards the high spin–isospin frontier using isotopically-identified fission fragments journal, January 2014

Realistic effective interactions for nuclear systems journal, October 1995

High-spin study of odd- A 49In isotopes beyond the neutron mid-shell journal, November 2002

Mass measurements of neutron-rich indium isotopes toward the N = 82 shell closure journal, February 2018

Dual Position Sensitive MWPC for tracking reaction products at VAMOS++ journal, March 2016

First observation of the decay of a 15 − seniority v = 4 isomer in Sn 128 journal, April 2011

Neutron-rich In and Cd isotopes close to the doubly magic Sn 132 journal, November 2004

Performance of the improved larger acceptance spectrometer: VAMOS++ journal, August 2011

Fission fragment isomers populated via Li 6 + Th 232 journal, January 2010

Identification of $\mathrm{\ensuremath J^{\pi} = 19/2^+}$ and $\mathrm{\ensuremath 23/2^+}$ isomeric states in 127Sb journal, October 2009

Conceptual design of the AGATA 1 π array at GANIL journal, May 2017

AGATA—Advanced GAmma Tracking Array journal, March 2012

Energy levels and transition probabilities in 130Sn journal, February 1981

High-spin states with seniority v = 4 , 5, and 6 in 119 – 126 Sn journal, May 2012

Decay properties of high-spin isomers and other structures in Sb 121 and Sb 123 journal, February 2009

New high-spin microsecond isomers in 131Sb journal, November 2000

On the "Magic Numbers" in Nuclear Structure journal, June 1949

High-spin microsecond isomers in 129 In and 129 Sb journal, May 2003

Effects of one valence proton on seniority and angular momentum of neutrons in neutron-rich Sb 51 122 – 131 isotopes journal, June 2019

Full 0ħω shell model calculation of the binding energies of the 1 f 7 / 2 nuclei journal, April 1999

Title: Prompt-delayed γ-ray spectroscopy of neutron-rich ^119.121In isotopes

Prompt-delayed $\gamma$ γ -ray spectroscopy with AGATA, EXOGAM and VAMOS++
journal, August 2017

On Closed Shells in Nuclei. II
journal, June 1949

Higher-seniority excitations in even neutron-rich Sn isotopes
journal, April 2014

Observation of new microsecond isomers among fission products from in-flight fission of 345 MeV/nucleon $^{238}$ U
journal, November 2012

Structure of the isomeric states in ${}^{123, 125}{Sb}$
journal, November 2007

Decay of ${}^{127}{In}$ and ${}^{129}{In}$
journal, May 2004

Towards the high spin–isospin frontier using isotopically-identified fission fragments
journal, January 2014

Realistic effective interactions for nuclear systems
journal, October 1995

High-spin study of odd- A 49In isotopes beyond the neutron mid-shell
journal, November 2002

Mass measurements of neutron-rich indium isotopes toward the $N = 82$ shell closure
journal, February 2018

Dual Position Sensitive MWPC for tracking reaction products at VAMOS++
journal, March 2016

First observation of the decay of a 15 $^{-}$ seniority $v = 4$ isomer in ${}^{128}{Sn}$
journal, April 2011

Neutron-rich In and Cd isotopes close to the doubly magic ${}^{132}{Sn}$
journal, November 2004

Performance of the improved larger acceptance spectrometer: VAMOS++
journal, August 2011

Fission fragment isomers populated via ${}^{6}{Li} + {}^{232}{Th}$
journal, January 2010

Identification of $\mathrm{\ensuremath J^{\pi} = 19/2^+}$ and $\mathrm{\ensuremath 23/2^+}$ isomeric states in 127Sb
journal, October 2009

Conceptual design of the AGATA $1 π$ array at GANIL
journal, May 2017

AGATA—Advanced GAmma Tracking Array
journal, March 2012

Energy levels and transition probabilities in 130Sn
journal, February 1981

High-spin states with seniority $v = 4$ , 5, and 6 in $^{119 - 126}$ Sn
journal, May 2012

Decay properties of high-spin isomers and other structures in ${}^{121}{Sb}$ and ${}^{123}{Sb}$
journal, February 2009

New high-spin microsecond isomers in 131Sb
journal, November 2000

On the "Magic Numbers" in Nuclear Structure
journal, June 1949

High-spin microsecond isomers in $^{129} In$ and $^{129} Sb$
journal, May 2003

Effects of one valence proton on seniority and angular momentum of neutrons in neutron-rich ${}_{51}^{122 - 131}{Sb}$ isotopes
journal, June 2019

Full 0ħω shell model calculation of the binding energies of the ${1 f}_{7 / 2}$ nuclei
journal, April 1999