A study of 26Al and 36Cl with the (p, d) reaction

doi:10.1016/0375-9474(73)90398-9

Nuclear Physics A

Volume 204, Issue 3, 16 April 1973, Pages 609-624

https://doi.org/10.1016/0375-9474(73)90398-9 Get rights and content

Abstract

Angular distributions from the (p, d) reaction on ²⁷Al and ³⁷Cl have been measured in order to obtain spectroscopic information for the odd nuclei ²⁶Al and ³⁶Cl. Good agreement was found between experimental spectroscopic factors for T = 1 states in ²⁶Al and those calculated from a $1 d_{32} -2 s_{12}$ shell-model scheme. This led to the identification of the J^π = 4⁺, T = 1 level in ²⁶Al at 4.699 MeV. The spectroscopic factors from the $2 s_{12} .-1 d_{32}$ and $1 d_{52} -2 s_{12} -1 d_{32}$ shell-model calculations for A = 36 nuclei are also in good agreement with experimental spectroscopic factors for ³⁶Cl. The excitation energy of the lowest J^π = 0⁺, T = 2 level in ³⁶Cl was determined to be 4.297 ±0.010 MeV.

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Cited by (24)

Nuclear Data Sheets for A = 26
2016, Nuclear Data Sheets
Evaluated spectroscopic data and level schemes from radioactive decay and nuclear reaction studies are presented for ²⁶O, ²⁶F, ²⁶Ne, ²⁶Na, ²⁶Mg, ²⁶Al, ²⁶Si, ²⁶P, and ²⁶S. This evaluation for A = 26 supersedes the earlier one by P. M. Endt (1998En04) and updates for some nuclides in ENSDF.
Highlights of this evaluation are the following:
This evaluation includes search results for ²⁶S nuclide and its proton–decay mode (2011Fo08).
An isomeric state (2.2 ms) in ²⁶F has been discovered by 2013Le03. The state is proposed at 643.4 keV 1 from γ–ray measurements. Internal-transition and beta-decay branches for the state are also determined. New excited levels in ²⁶Ne have been identified from ²⁶F β⁻ decay (2.2 ms).
For some ²⁶Si resonance states conflicting spin-parity assignments exist in the literature. These are identified by footnotes. 2015Do07 (³He,nγ) propose the first 0+ state above proton separation energy at an excitation energy of 5890 keV and suggested for additional independent measurements to confirm or refute the existence of 5946 keV 4. 2016Ch09 consider 5946 keV level as a distinct excited state in their reanalysis of the literature data with possible spin-parity assignment of 0+ or 4+
This evaluation also includes discovery of an isomeric state, at 164.1 keV 1, in ²⁶P by 2014NiZZ.
Nuclear Data Sheets for A = 36
2012, Nuclear Data Sheets
Nuclear spectroscopic information for experimentally investigated nuclides of mass 36 (Mg, Al, Si, P, S, Cl, Ar, K, Ca) has been evaluated. The principal sources of the ‘adopted levels’ presented for nuclides close to the stability line are Endtʼs evaluations (1990En08, 1978En02). The data sets for reactions and decays, including all available gamma–ray data, are based mostly on the original literature. The ³⁶Na has been looked for but not yet experimentally detected. There are no data available for the excited states in ³⁶Al, and for ³⁶Mg and ³⁶Ca, only one excited state is known.
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.
Level structure of 28Si by the 27Al(3He, d)28Si reaction
1982, Nuclear Physics, Section A
The level structure of ²⁸Si up to an excitation energy of 15.5 MeV has been studied by the ²⁷Al(³He, d)²⁸ reaction at 35 MeV bombarding energy. The experimental angular distributions were analyzed with distorted-wave Born approximation calculations. Values of the transferred orbital angular momenta l and spectroscopic factors were obtained for about sixty levels. Strong transitions to about twenty odd-parity states up to 15.5 MeV excitation were observed and identified with the $(1 d_{52}^{−1} 1 f_{72})$ and $(1 d_{52}^{−1} 2 p_{32},_{12})$ configurations. Tentative isospin assignments were made by comparison with ²⁸Al levels.
The photoproton decay of 27Al
1981, Nuclear Physics, Section A
Photoproton spectra from ²⁷Al were measured from 14.8 to 27.6 MeV excitation energy in 400 keV steps. From these, high resolution photoproton cross sections to low-lying states of the residual ²⁶Mg nucleus were deduced. The large integrated cross sections to these states justify the interpretation of the de-excitation γ-ray measurements which consistently indicate strong population of low-lying residual states following photodisintegration. Further, the results are discussed with reference to the particle-hole model. By examination of the microscopic configurations of the possible GDR states an explanation is proposed for the differences in the cross sections to various residual states. Finally, the results are compared with spectroscopic factors determined from pickup reactions on ²⁷Al.
Energy levels of A = 21-44 nuclei (VI)
1978, Nuclear Physics, Section A
The experimentally determined properties of the A = 21–44 nuclei are compiled and evaluated, special emphasis being given to nuclear structure.
Separate tables for each of the nuclides reviewed give all available information about the following properties in this order: - excitation energies (E_x),
1. •
  - γ-ray branching ratios,
2. •
  - γ-ray mixing ratios (δ),
3. •
  - lifetimes (τ_m) or widths (Λ),
4. •
  - spin and parity (J^π) and isospin (T) assignments, and
5. •
  - any other data, on single-particle transfer, resonance levels, etc.
The “best” (or adopted) values for E_x, τ_m or Λ, J^π and T are summarized in a master table.
The review of each A-chain concludes with - a discussion of isospin multiplets,
1. •
  - a few remarks about the experimental situation, and
2. •
  - a compilation of references to relevant theoretical papers.

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Nuclear Physics A

Abstract

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Cited by (24)

Nuclear Data Sheets for A = 26

Nuclear Data Sheets for A = 36

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

Level structure of <sup>28</sup>Si by the <sup>27</sup>Al(<sup>3</sup>He, d)<sup>28</sup>Si reaction

The photoproton decay of <sup>27</sup>Al

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