α decay of high-spin isomers in N = 84 isotones

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

doi:10.1103/PhysRevC.99.024325

α decay of high-spin isomers in N = 84 isotones

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

Lawrence Berkeley National Laboratory

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Abstract

The superfluid tunneling model is applied to the calculation of half-lives of the observed α decays in N=84 isotones. Results of our calculations are compared to experimental data on the ground-state α decays along the isotonic chain from ¹⁴⁴Nd to ¹⁵⁹Re. Good agreement is found. The α decays of the known high-spin isomers in ¹⁵⁵Lu, ¹⁵⁶Hf, ¹⁵⁷Ta, and ¹⁵⁸W are also well reproduced, once a reduction in the pairing strength is taken into account. This includes reproduction of the main features of the recently observed fine structure from ¹⁵⁵Lu (25/2^-) and ¹⁵⁶Hf (8⁺). Predictions for the α-decay fine structure of ¹⁵⁷Ta (25/2^-) and ¹⁵⁸W (8⁺) high-spin isomers are presented.

Original language	English
Article number	024325
Number of pages	6
Journal	Physical Review C
Volume	99
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.99.024325
Publication status	Published - 2019 Feb 28

Subject classification (UKÄ)

Subatomic Physics

Free keywords

alpha decay
isomer decays
lifetimes & widths
nuclear structure and decays

Access to Document

10.1103/PhysRevC.99.024325

PhysRevC.99.024325Final published version, 532 KBLicence: CC BY

Cite this

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title = "α decay of high-spin isomers in N = 84 isotones",

abstract = "The superfluid tunneling model is applied to the calculation of half-lives of the observed α decays in N=84 isotones. Results of our calculations are compared to experimental data on the ground-state α decays along the isotonic chain from 144Nd to 159Re. Good agreement is found. The α decays of the known high-spin isomers in 155Lu, 156Hf, 157Ta, and 158W are also well reproduced, once a reduction in the pairing strength is taken into account. This includes reproduction of the main features of the recently observed fine structure from 155Lu (25/2-) and 156Hf (8+). Predictions for the α-decay fine structure of 157Ta (25/2-) and 158W (8+) high-spin isomers are presented.",

keywords = "alpha decay, isomer decays, lifetimes \& widths, nuclear structure and decays",

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

year = "2019",

month = feb,

day = "28",

doi = "10.1103/PhysRevC.99.024325",

language = "English",

volume = "99",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

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TY - JOUR

T1 - α decay of high-spin isomers in N = 84 isotones

AU - Clark, R. M.

AU - Crawford, H. L.

AU - Macchiavelli, A. O.

AU - Rudolph, D.

AU - Såmark-Roth, A.

AU - Campbell, C. M.

AU - Cromaz, M.

AU - Fallon, P.

AU - Morse, C.

AU - Santamaria, C.

PY - 2019/2/28

Y1 - 2019/2/28

N2 - The superfluid tunneling model is applied to the calculation of half-lives of the observed α decays in N=84 isotones. Results of our calculations are compared to experimental data on the ground-state α decays along the isotonic chain from 144Nd to 159Re. Good agreement is found. The α decays of the known high-spin isomers in 155Lu, 156Hf, 157Ta, and 158W are also well reproduced, once a reduction in the pairing strength is taken into account. This includes reproduction of the main features of the recently observed fine structure from 155Lu (25/2-) and 156Hf (8+). Predictions for the α-decay fine structure of 157Ta (25/2-) and 158W (8+) high-spin isomers are presented.

AB - The superfluid tunneling model is applied to the calculation of half-lives of the observed α decays in N=84 isotones. Results of our calculations are compared to experimental data on the ground-state α decays along the isotonic chain from 144Nd to 159Re. Good agreement is found. The α decays of the known high-spin isomers in 155Lu, 156Hf, 157Ta, and 158W are also well reproduced, once a reduction in the pairing strength is taken into account. This includes reproduction of the main features of the recently observed fine structure from 155Lu (25/2-) and 156Hf (8+). Predictions for the α-decay fine structure of 157Ta (25/2-) and 158W (8+) high-spin isomers are presented.

KW - alpha decay

KW - isomer decays

KW - lifetimes & widths

KW - nuclear structure and decays

UR - https://www.scopus.com/pages/publications/85062472746

U2 - 10.1103/PhysRevC.99.024325

DO - 10.1103/PhysRevC.99.024325

M3 - Article

AN - SCOPUS:85062472746

SN - 2469-9985

VL - 99

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 024325

ER -

α decay of high-spin isomers in N = 84 isotones

Abstract

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Cite this

α decay of high-spin isomers in N = 84 isotones

Abstract

Subject classification (UKÄ)

Free keywords

Access to Document

Other files and links

Fingerprint

Research output

α decay of the neutron-deficient isotope 190At

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Projects

ChaSE Lundium: Characterization of New Superheavy Elements

Activities

Roderick M. Clark

Cite this

α decay of the neutron-deficient isotope ¹⁹⁰At

Enhancement of α-particle formation near ¹⁰⁰Sn

α Decay of High-K Isomers in ²⁷⁰Ds and ²⁶⁶Hs in a Superfluid Tunneling Model