Rotational structure in 29Si

doi:10.1016/0375-9474(70)90188-0

Nuclear Physics A

Volume 158, Issue 2, 14 December 1970, Pages 364-384

https://doi.org/10.1016/0375-9474(70)90188-0 Get rights and content

Abstract

Properties of excited states below 5.3 MeV in ²⁹Si have been deduced, from proton-γ angular correlations in inelastic proton scattering, and from γ-ray angular distributions in the ²⁶Mg(α, nγ) reaction. Spins $72$ , $92$ , $32$ , $52$ , and $72$ have been assigned to the levels at 4.08 MeV, 4.74 MeV, 4.84 MeV, 4.89 MeV and 5.28 MeV respectively, and previous spin assignments have been confirmed for all other levels below 5.3 MeV. Branching ratios have been measured for all these levels. A number of multipole mixing ratios have been deduced, and have been supplemented by angular correlation data from inelastic α-particle scattering. The results are shown to be consistent with some predictions of the strong-coupling rotational model.

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Nuclear Data Sheets for A = 29
2012, Nuclear Data Sheets
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.
Étude de la structure du noyau 29P
1974, Nuclear Physics, Section A
The ²⁸Si(p, γ)²⁹P reaction was used between E_p = 371 and 2880 keV to study the γ-ray decay often excited states of ²⁹P. Gamma-ray angular distributions were measured with Ge(Li) detectors and γ-γ angular correlations with a multicounter goniometer. Resonance strengths as well as γ-ray branching ratios have been measured precisely. Spin values of the 2.42, 3.45, 4.08, 4.95 and 5.29 MeV levels were found to be $32$ , ( $72$ ), $72$ , $52$ and $72$ , respectively. were also measured. From Doppler-shift attenuation measurements the mean lives of the 1.38, 1.95, 2.42 and 4.08 MeV levels have been found as 240±70, 450±90, 25±12 and 15±4'fs, respectively. Additional measurements in the ²⁸Si(d, nγ)²⁹P reaction yield the lifetimes of the 1.38, 1.95, 2.42 and 3.11 MeV levels as 205±25, 465±60, 33±11 and 33±15 fs, respectively. The ²⁹P nuclear structure is discussed in the collective model and shell model framework.
Energy levels of A = 21-44 nuclei (V)
1973, Nuclear Physics, Section A
Study of the 27Al(3He, p)29Si reaction
1972, Nuclear Physics, Section A
Investigation of the reaction 28Si(d, p)29Si at E<inf>d</inf>=10 MeV
1972, Nuclear Physics, Section A
An extensive DWBA analysis of the reaction ²⁸Si(d, p)²⁹Si at E_d = 10 MeV has been carried out, including transitions to final states in ²⁹Si up to excitation energy of 8.416 MeV. Assuming spherical optical and bound-state potentials the orbital angular momentum transferred in the reaction and the absolute spectroscopic factors have been determined from the differential cross sections. Empirical rules for the j-dependence of the angular distribution are used to give spin assignments. The sum rules and centres of gravity of the states have been considered. To take into account collective effects the transitions to strongly excited states are treated in a generalized DWBA model with deformed potentials, using an adiabatic approximation and neglecting the mixing of rotational bands.

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^†: Permanent address: Physico-Technical Institute, Academy of Science of the Ukrainian SSR, Kharkov, USSR.

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Nuclear Physics A

Abstract

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Cited by (19)

Nuclear Data Sheets for A = 29

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

Étude de la structure du noyau <sup>29</sup>P

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

Study of the <sup>27</sup>Al(<sup>3</sup>He, p)<sup>29</sup>Si reaction

Investigation of the reaction <sup>28</sup>Si(d, p)<sup>29</sup>Si at E<inf>d</inf>=10 MeV