Measurement of spin alignment for the 15N32 (6.33 MeV) state from the (16O, 15N) reaction using γ-recoil in flight

doi:10.1016/0370-2693(79)90199-0

Physics Letters B

Volume 80, Issue 3, 1 January 1979, Pages 208-211

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Abstract

High resolution for the ²⁷Al(¹⁶O, ¹⁵N)²⁸Si reaction were measured with a Q3D magnetic spectrometer. The broadened line shape of the $^{15} N_{32}$ (6.33 MeV) state after γ-decay in flight was analysed. The m-state population of this state was deduced taking the E2/M1 mixing ratio of δ = +0.1 into account. The connection between spin alignment and the dynamics of the transfer process is discussed.

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Cited by (6)

Tensor polarisation of 12C(15.11 MeV, Jπ = 1+) in the 13C(p,d)12C(→12C g.s. + γ) reaction at E<inf>p</inf> = 41.3 MeV
1987, Nuclear Physics, Section A
Angular correlation measurements have been made between the deuterons and the ¹²C g.s. product nuclei in the reaction $^{13} C (p,d)^{12} C^{∗} (15.11 MeV, 1^{+})(→^{120} C g.s. + γ)$ at deuteron scattering angles of 40°, 50°, 60°, and 75°, and a proton bombarding energy of 41.3 MeV. These measurements yield information concerning the k = 2 polarisation tensors (t_2q) of the excited ¹²C nucleus produced in the direct (p, d) reaction. Cross-section angular distributions to the strongly excited g.s., 4.43, 12.71, 15.11 and 16.11 MeV states are also reported. Monte Carlo simulations of the laboratory distribution functions associated with the individual t_kq were performed, incorporating the effects of finite geometry (beam spot and detector sizes), beam divergence, energy loss and multiple scattering of the ¹²C nuclei in the target. Finite range DWBA calculations were performed describing the polarisation tensors and cross sections, assuming a 1p neutron pickup. DWBA calculations for both conventional (elastic) and adiabatic d + ¹²C potentials were performed. Also, the effects of spin-orbit and the T_r and T_ℓ tensor potential were studied. The results confirmed that the “standard” DWBA formalism using an elastic d + ¹²C potential is inadequate for describing the recoil nucleus polarization. The use of adiabatic potentials, which arise from three-body effects, produced an improvement in the description of the extracted data. The DWBA calculations showed only a modest sensitivity to inclusion of spin-orbit and the T_r or T_ℓ tensor terms in the deuteron optical potential.
Tensor polarization of 12C[2+<inf>1</inf>] in the 16O(13C,12C)17O reaction at 50 MeV
2000, European Physical Journal A
Study of high-lying cluster states of nuclei by the method of particle-particle angular correlations
1998, Physics of Particles and Nuclei
Particle line shape after γ-ray emission in flight
1985, Zeitschrift für Physik A Atoms and Nuclei
Spin alignment and polarisation in the (16O,15N) transfer reactions
1979, Zeitschrift für Physik A Atoms and Nuclei
The m-state population of12C<inf>2+</inf> in inelastic scattering
1979, Zeitschrift für Physik A Atoms and Nuclei

¹: Also Fachbereich Physik, Freie Universität Berlin.

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Physics Letters B

Abstract

References (8)

Phys. Rev.

Phys. Rev. Lett.

Phys. Rev. Lett.

Z. Phys.

Cited by (6)

Tensor polarisation of <sup>12</sup>C(15.11 MeV, J<sup>π</sup> = 1<sup>+</sup>) in the <sup>13</sup>C(p,d)<sup>12</sup>C(→<sup>12</sup>C g.s. + γ) reaction at E<inf>p</inf> = 41.3 MeV

Tensor polarization of <sup>12</sup>C[2<sup>+</sup><inf>1</inf>] in the <sup>16</sup>O(<sup>13</sup>C,<sup>12</sup>C)<sup>17</sup>O reaction at 50 MeV

Study of high-lying cluster states of nuclei by the method of particle-particle angular correlations

Particle line shape after γ-ray emission in flight

Spin alignment and polarisation in the (<sup>16</sup>O,<sup>15</sup>N) transfer reactions

The m-state population of<sup>12</sup>C<inf>2+</inf> in inelastic scattering