Enhancement of α -particle formation near Sn100

Clark, R. M.; Macchiavelli, A. O.; Crawford, H. L.; Fallon, P.; Rudolph, D.; Såmark-Roth, A.; Campbell, C. M.; Cromaz, M.; Morse, C.; Santamaria, C.

doi:10.1103/PhysRevC.101.034313

Title: Enhancement of $α$ -particle formation near ${}^{100}{Sn}$

Abstract

The superfluid tunneling model is applied to the calculation of ground-state-to-ground-state α decay in the even-even neutron-deficient Te-Ba nuclei. Here, we show that there is a larger α-particle formation probability in nuclei of this region above ¹⁰⁰Sn when compared to analogous nuclei above ²⁰⁸Pb. This is consistent with the expected systematic variation of the pair gap Δ as a function of mass number. Finally, the recent experimental data on the α decay of the N=Z nuclei ¹⁰⁴Te and ¹⁰⁸Xe are shown to leave open the possibility of enhanced α-particle formation involving nucleon correlations beyond the standard treatment of like-nucleon pairing, which is the mechanism suggested as underlying "superallowed" α decay.

Authors:

Clark, R. M. ^[1]; Macchiavelli, A. O. ^[1]; Crawford, H. L. ^[1]; Fallon, P. ^[1];

^[2];

^[2]; Campbell, C. M. ^[1]; Cromaz, M. ^[1]; Morse, C. ^[1]; Santamaria, C. ^[1]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lund Univ. (Sweden)

Publication Date:: Fri Mar 27 00:00:00 EDT 2020

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

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); Knut and Alice Wallenberg Foundation

OSTI Identifier:: 1616983

Alternate Identifier(s):: OSTI ID: 1606617

Grant/Contract Number:: AC02-05CH11231; KAW 2015.0021

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 101; Journal Issue: 3; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; alpha decay; nuclear structure & decays; 90 < A < 149

Citation Formats


                    Clark, R. M., Macchiavelli, A. O., Crawford, H. L., Fallon, P., Rudolph, D., Såmark-Roth, A., Campbell, C. M., Cromaz, M., Morse, C., and Santamaria, C. Enhancement of α -particle formation near Sn100.  United States: N. p., 2020. 
Web.  doi:10.1103/PhysRevC.101.034313.

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                    Clark, R. M., Macchiavelli, A. O., Crawford, H. L., Fallon, P., Rudolph, D., Såmark-Roth, A., Campbell, C. M., Cromaz, M., Morse, C., & Santamaria, C. Enhancement of α -particle formation near Sn100.  United States.  https://doi.org/10.1103/PhysRevC.101.034313

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                    Clark, R. M., Macchiavelli, A. O., Crawford, H. L., Fallon, P., Rudolph, D., Såmark-Roth, A., Campbell, C. M., Cromaz, M., Morse, C., and Santamaria, C. Fri .  
"Enhancement of α -particle formation near Sn100".  United States.  https://doi.org/10.1103/PhysRevC.101.034313.  https://www.osti.gov/servlets/purl/1616983.

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@article{osti_1616983,

  title        = {Enhancement of α -particle formation near Sn100},

  author       = {Clark, R. M. and Macchiavelli, A. O. and Crawford, H. L. and Fallon, P. and Rudolph, D. and Såmark-Roth, A. and Campbell, C. M. and Cromaz, M. and Morse, C. and Santamaria, C.},

  abstractNote = {The superfluid tunneling model is applied to the calculation of ground-state-to-ground-state α decay in the even-even neutron-deficient Te-Ba nuclei. Here, we show that there is a larger α-particle formation probability in nuclei of this region above 100Sn when compared to analogous nuclei above 208Pb. This is consistent with the expected systematic variation of the pair gap Δ as a function of mass number. Finally, the recent experimental data on the α decay of the N=Z nuclei 104Te and 108Xe are shown to leave open the possibility of enhanced α-particle formation involving nucleon correlations beyond the standard treatment of like-nucleon pairing, which is the mechanism suggested as underlying "superallowed" α decay.},

  doi          = {10.1103/PhysRevC.101.034313},

  journal      = {Physical Review C},

  number       = 3,

  volume       = 101,

  place        = {United States},

  year         = {Fri Mar 27 00:00:00 EDT 2020},

  month        = {Fri Mar 27 00:00:00 EDT 2020}

}

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Title: Enhancement of α -particle formation near Sn 100

Abstract

Citation Formats

Nuclear Superfluidity book, August 2009

Measurements of 110Xe and 106Te decay half-lives journal, December 2004

Alpha radioactivity above Sn 100 including the decay of I 108 journal, June 1994

Alpha-transfer reactions and the pairing-vibration model journal, October 1977

Microscopic theory of cluster radioactivity journal, February 1998

Exotic radioactivity as a superfluid tunneling phenomenon journal, February 1988

Alpha decay studies of tellurium, iodine, xenon and cesium isotopes journal, September 1979

α decay of Te 105 journal, June 2006

Nuclear Data Sheets for A = 106 journal, April 2008

Alpha decay of 114Ba journal, April 2002

Direct observation of the Ba 114 → Xe 110 → Te 106 → Sn 102 triple α -decay chain using position and time correlations journal, August 2016

New Region of Alpha Radioactivity journal, January 1965

Wave Mechanics and Radioactive Disintegration journal, September 1928

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α decay of high- K isomers in Ds 270 and Hs 266 in a superfluid tunneling model journal, February 2018

Is there neutron-proton pairing in medium heavy nuclei? journal, May 1984

α -decay calculations of heavy nuclei using an effective Skyrme interaction journal, December 2013

Effect of the reduced pairing interaction on α -decay half-lives of multi-quasiparticle isomeric states journal, October 2014

Large-amplitude motion in superfluid fermi droplets journal, January 1990

Proton and alpha radioactivity of very neutron deficient Te, I, Xe and Cs isotopes, studied after electrostatic separation journal, June 1991

Alpha decay of neutron-deficient isotopes with 52 ≦ Z ≦ 55, including the new isotopes 106Te (T12 = 60 μs) and 110Xe journal, September 1981

Empirical pairing gaps, shell effects, and di-neutron spatial correlation in neutron-rich nuclei journal, August 2015

Calculation of the absolute lifetimes of the variety of decay modes of U 234 journal, May 1989

α decay in the complex-energy shell model journal, September 2012

Discovery of Xe 109 and Te 105 : Superallowed α Decay near Doubly Magic Sn 100 journal, August 2006

Microscopic description of superallowed α -decay transitions journal, May 2016

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Critical-Point Description of the Transition from Vibrational to Rotational Regimes in the Pairing Phase journal, January 2006

Overview of neutron–proton pairing journal, September 2014

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Title: Enhancement of $α$ -particle formation near ${}^{100}{Sn}$

Nuclear Superfluidity
book, August 2009

Measurements of 110Xe and 106Te decay half-lives
journal, December 2004

Alpha radioactivity above ${}^{100}{Sn}$ including the decay of ${}^{108}I$
journal, June 1994

Alpha-transfer reactions and the pairing-vibration model
journal, October 1977

Microscopic theory of cluster radioactivity
journal, February 1998

Exotic radioactivity as a superfluid tunneling phenomenon
journal, February 1988

Alpha decay studies of tellurium, iodine, xenon and cesium isotopes
journal, September 1979

α decay of ${}^{105}{Te}$
journal, June 2006

Nuclear Data Sheets for A = 106
journal, April 2008

Alpha decay of 114Ba
journal, April 2002

Direct observation of the ${}^{114}{Ba} \to {}^{110}{Xe} \to {}^{106}{Te} \to {}^{102}{Sn}$ triple $α$ -decay chain using position and time correlations
journal, August 2016

New Region of Alpha Radioactivity
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Wave Mechanics and Radioactive Disintegration
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Superallowed $α$ Decay to Doubly Magic ${}^{100}{Sn}$
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$α$ decay of high- K isomers in ${}^{270}{Ds}$ and ${}^{266}{Hs}$ in a superfluid tunneling model
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Is there neutron-proton pairing in medium heavy nuclei?
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$α$ -decay calculations of heavy nuclei using an effective Skyrme interaction
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Effect of the reduced pairing interaction on $α$ -decay half-lives of multi-quasiparticle isomeric states
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Large-amplitude motion in superfluid fermi droplets
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Proton and alpha radioactivity of very neutron deficient Te, I, Xe and Cs isotopes, studied after electrostatic separation
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Alpha decay of neutron-deficient isotopes with 52 ≦ Z ≦ 55, including the new isotopes 106Te (T12 = 60 μs) and 110Xe
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Overview of neutron–proton pairing
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