Population of high spin states in 22Na by means of the 10B(16O, α) reaction

doi:10.1016/0370-2693(73)90677-1

Physics Letters B

Volume 46, Issue 2, 17 September 1973, Pages 180-182

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Abstract

Strong selectivity has been observed in the population of states in ²²Na up to high excitation energies. Angular distributions were measured, and a comparison with Hauser-Feshbach calculations allow us to select strong candidates for the high-spin members of the K^π = 3⁺, T = 0 and K^π = 0⁺, T = 0 bands in ²²Na.

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Cited by (12)

Nuclear Data Sheets for A = 22
2015, Nuclear Data Sheets
Nuclear Data Sheets for A = 22
2005, Nuclear Data Sheets
This evaluation of $A = 22$ has been updated from previous evaluations published in 1998En04, 1990En08, and 1978En02. Coverage includes properties of adopted levels and γ rays, decay-scheme data (energies, intensities and placement of radiations), and cross reference entries. The following tables continue the tradition of showing the systematic relationships between levels in $A = 22$ . These assignments are based on spectroscopic factors and energy differences where $Δ E_{x} = E_{x} ({}^{22}{Na}) - E_{x} ({}^{22}{Ne}) - 657.16$ or $Δ E_{x} = E_{x} ({}^{22}{Mg}) - E_{x} ({}^{22}{Ne})$ .
Yrast 8+ and 9+ states of 22Na
1989, Physics Letters B
Gamma-decaying high-spin states of ²²Na populated in the ¹²C(¹⁴N, α) reaction were studied, using a recoil-coincidence technique to measure values of $Γ_{γ} Γ$ and an α-γ coincidence arrangement to measure lifetimes and γ-decay branches. Good candidates have been found for the yrast 8⁺ and 9⁺ levels at excitation energies of 8572±3 and 9813±3 keV, respectively. Their properties are compared with those predicted by the shell model and test these calculations in the region where band termination is expected.
The physics of large tandems
1977, Nuclear Instruments and Methods
Prediction of the high-spin selectivity of compound reactions induced by heavy ions
1975, Nuclear Physics, Section A
Two procedures are described to predict the selectivity of heavy-ion (HI) compound reactions for excitation of high spins. The applicability of statistical-model calculations in respect to yrast line effects is discussed. Contour diagrams of the total cross sections $σ(E^{∗}, I), dσ(E^{∗}, I)/ d E^{∗} and d σ(E^{∗})/ d E^{∗}$ are derived, yielding the gradient $d σ(E^{∗}, I)/ d I$ and the p to “background” ratio of high-spin states as well as the “optimum Q-value” for any given HI compound reaction. The dependence of both the optimum Q-value and the shape of $d σ(E^{∗})/ d E^{∗}$ on the critical L-value at high bombarding energies can be used to determine L_crit. This is demonstrated for the reaction $^{12} C +^{14} N →^{26} AI$ . A rougher estimate of the selectivity is given by the “grazing-collision picture” which is based on a consideration of the angular momentum balance. Using the reactions ¹⁰B(¹²C, d), ¹²C(¹²C, d), ¹²C(¹⁴N, d), ¹¹B(¹⁴N, p), ¹³C(¹⁴N, p), $^{10} B (^{14} N, α)$ and ¹²C(¹⁴N, ⁶Li) as examples, the theoretical predictions are shown to be in excellent agreement with experiment, for bombarding energies ranging between 40 and 120 MeV. The possibility to predict the high-spin selectivity is the precondition for an application of HI compound reactions for investigations of yrast lines and converts this class of reactions into an outstanding means for spectroscopy of high-spin states in light nuclei.
Spectroscopy with high spin selective compound reactions induced by heavy ions
1974, Physics Letters B

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^☆: Research sponsored by the U.S. Atomic Energy Commission under contract with Union Carbide Corporation.

^∗∗: Instituto de Fisica, UNAM, Mexico 20, D.F., supported in part by Instituto Nacional de Energia Nuclear, Mexico.

^∗∗∗: Research participation at Oak Ridge National Laboratory supported in part by Oak Ridge Associated Universities.

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Physics Letters B

Abstract

References (17)

Nucl. Phys.

Nucl. Instr.

Phys. Rev. Lett.

Phys. Rev. Lett.

Proc. of the Heavy-ion Summer Study

Phys. Rev.

Phys. Rev.

Cited by (12)

Nuclear Data Sheets for A = 22

Nuclear Data Sheets for A = 22

Yrast 8<sup>+</sup> and 9<sup>+</sup> states of <sup>22</sup>Na

The physics of large tandems

Prediction of the high-spin selectivity of compound reactions induced by heavy ions

Spectroscopy with high spin selective compound reactions induced by heavy ions

Population of high spin states in 22Na by means of the 10B(16O, α) reaction☆

Abstract

Nucl. Phys.

Nucl. Instr.

Phys. Rev. Lett.

Phys. Rev. Lett.

Proc. of the Heavy-ion Summer Study

Phys. Rev.

Phys. Rev.

Population of high spin states in ²²Na by means of the $^{10} B (^{16} O, α)$ reaction☆