Observation of beta-delayed protons in the decay of 31Cl

doi:10.1016/0370-2693(82)91033-4

Physics Letters B

Volume 110, Issue 6, 15 April 1982, Pages 437-440

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Abstract

Beta-delayed protons have been observed from the decay of the $T_{z} = − 32$ nucleus ³¹Cl produced via the ³²S(p, 2n) reaction. The energy of the observed proton group was measured to be 989 ± 15 keV and it was found to decay with a half-life of 150₋₂₀⁺²⁵ ms.

References (16)

N.A. Jelley et al.
Phys. Rev.
(1975)
I. Kelson et al.
Phys. Lett.
(1966)
R.A. Gough et al.
Phys. Rev. Lett.
(1972)
K. Takashi et al.
At. Data Nucl. Data Tables
(1973)
J.M. Davidson
Nucl. Phys.
(1975)
J. CernyW. Benenson
J. Äystö et al.
J. Cerny et al.
Ann. Rev. Nucl. Sci.
(1977)

There are more references available in the full text version of this article.

Cited by (12)

Nuclear Structure and Decay Data for A=31 Isobars
2022, Nuclear Data Sheets
Experimental nuclear spectroscopic data are evaluated for 11 known nuclides of mass 31 (F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K). Detailed evaluated information is presented for each reaction and decay experiment. Combining all the available data, recommended values are provided for energies, spins and parities, and half-lives of levels, with energies, branching ratios and multipolarities of γ radiations, and characteristics of β and α radiations in radioactive decays. ³¹P is the most extensively studied one among all nuclides via various reactions and decays, followed by ³¹S, ³¹Si, ³¹Mg and ³¹Al. Information for excited states in ³¹Ne, ³¹Na, ³¹Cl, ³¹Ar and ³¹K are limited; no excited states have yet been identified in ³¹F, even its ground-state half-life is unknown. Significant new data have become available for the structure of ³¹S, with its relevance to astrophysical applications. This work supersedes the earlier evaluation of A=31 by 2013Ou01, with literature cutoff date of Feb 15, 2013.
Nuclear Data Sheets for A = 31
2013, Nuclear Data Sheets
Nuclear spectroscopic information for the known nuclides of mass 31 (F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar) has been evaluated. A useful source of many of the Adopted Levels for ³¹P and ³¹S is presented in Endtʼs evaluations (1998En04,1990En08,1978En02,1973EnVA), however all the adopted properties of levels and gamma rays have been re-evaluated in this work. The data sets for reactions and decays, including all available gamma–ray data, are based mostly on the original literature.
The 31Mg nuclide is a prime candidate for the study of ‘island-of-inversion’ as its ground state and first excited state can only be explained by intruder orbitals in a deformed shell-model approach. ³¹S is of importance in astrophysics rp-process as a possible ‘bottleneck’ nuclide. There are no data available for excited states in ³¹F, ³¹Ne and ³¹Ar. No gamma transitions are known in ³¹Cl. For ³¹Na, only one excited state is known. The radioactive decay characteristics of ³¹F and ³¹Ne isotopes have not yet been investigated. The ³¹S and ³¹Mg nuclei are currently being pursued intensively by various experimental groups, including recent work by Nuclear Astrophysics group at McMaster, the results of which will soon become available.
Energy levels of A = 21-44 nuclei (VII)
1990, Nuclear Physics, Section A
The experimentally determined properties of A = 21–44 nuclides are complied and evaluated with special emphasis on nuclear spectroscopy.
Separate tables for each of the nuclides reviewed present the available information about the following properties (in this order):
- •
  - excitation energies E_x,
- •
  - γ-ray branching ratios b(γ),
- •
  - γ-ray mixing ratios σ,
- •
  - lifetimes γ_m or widths Λ,
- •
  - neutron, proton, or α-particle resonances,
- •
  - partial widths,
- •
  - single-nucleon transfer reactions,
- •
  - beta-decay,
- •
  - arguments for spin and parity (J^π) and isospin (T) assignments.
For each nuclide a master table summarizing the “best” or adopted values for E_x, J^π; T and τ_m or Λ precedes the auxiliary tables listed above.
The review of each A-chain concludes with a discussion of isospin multiplets.
Figures are presented of the level schemes of all nuclei and, for each A-chain, an overview of the relative energies of the ground states and lowest analogue states of all nuclei in the chain.
High resolution Gamow-teller strength measurement via β-decay of 65Ge
1987, Nuclear Physics, Section A
The β⁺ decay of ⁶⁵Ge was studied by β-delayed proton and γ-ray emission. The He-jet technique was used. Altogether 28 proton groups (1.0 MeV<E_p<2.1 MeV) were observed with proton energy resolution of about 10 keV. The proton spectrum apparently consists of discrete proton groups due to a selective population of excited states of ⁶⁵Ga by Gamow-Teller β⁺ decay. The total proton branching ratio was measured to be (1.1±0.3)×10⁻⁴. Upper limit of log ft values for beta transitions associated with the observed delayed proton groups and γ-rays were calculated and an experimental beta transition strength function was obtained. The single level structure of ⁶⁵Ga was studied by the ⁶⁴Zn(p, γ)⁶⁵Ga resonance reaction in the proton energy range 1.1 MeV<E_p<2.1 MeV with 1.0 keV overall energy resolution and about 170 resonance levels were observed. Angular distribution and resonance decay measurements were done to study the nature of selected single levels and decay properties of low energy levels. The proton binding energy of ⁶⁵Ga was measured to be B_p = 3943.0±1.0 keV.
Comparison of convective diffusion calculations with Monte Carlo calculations in poiseuille flow
1983, Journal of Aerosol Science
Beta-decay of 31Cl: an indirect probe of the 30P(p, γ)31S reaction. Present status and future perspectives
2016, European Physical Journal Plus

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^☆: The authors wish to thank the cyclotron crew of the University of Oslo for efficient cooperation. We are obliged to Mr. E. Rauhala for his contribution to the backscattering analysis of target foils. This work was financially supported by the Nordic Accelerator Committee (NOAC).

¹: Present address: Lawrence Berkeley Laboratory, Berkeley, USA.

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Physics Letters B

Abstract

References (16)

Phys. Rev.

Phys. Lett.

Phys. Rev. Lett.

At. Data Nucl. Data Tables

Nucl. Phys.

Ann. Rev. Nucl. Sci.

Cited by (12)

Nuclear Structure and Decay Data for A=31 Isobars

Nuclear Data Sheets for A = 31

Energy levels of A = 21-44 nuclei (VII)

High resolution Gamow-teller strength measurement via β-decay of <sup>65</sup>Ge

Comparison of convective diffusion calculations with Monte Carlo calculations in poiseuille flow

Beta-decay of <sup>31</sup>Cl: an indirect probe of the <sup>30</sup>P(p, γ)<sup>31</sup>S reaction. Present status and future perspectives

Observation of beta-delayed protons in the decay of 31Cl☆

Abstract

Phys. Rev.

Phys. Lett.

Phys. Rev. Lett.

At. Data Nucl. Data Tables

Nucl. Phys.

Ann. Rev. Nucl. Sci.

Observation of beta-delayed protons in the decay of ³¹Cl☆