Nuclear spin alignment of 12,13B produced in heavy ion collisions

T. Nagatomo; K. Matsuta; K. Hashimoto; M. Ota; K. Arimura; K. Minamisono; T. Sumikama; M. Ogura; T. Iwakoshi; T. Miyake; S. Kudo; K. Akutsu; T. Minamisono; M. Fukuda; M. Mihara; S. Momota; Y. Nojiri; A. Kitagawa; M. Torikoshi; M. Kanazawa; M. Suda; M. Hirai; T. J.M. Symons; G. F. Krebs; J. R. Alonso; S. Y. Zhu; J. Z. Zhu; Y. J. Xu

doi:10.1023/a:1020554331850

Nuclear spin alignment of ^12,13B produced in heavy ion collisions

T. Nagatomo, K. Matsuta, K. Hashimoto, M. Ota, K. Arimura, K. Minamisono, T. Sumikama, M. Ogura, T. Iwakoshi, T. Miyake, S. Kudo, K. Akutsu, T. Minamisono, M. Fukuda, M. Mihara, S. Momota, Y. Nojiri, A. Kitagawa, M. Torikoshi, M. KanazawaM. Suda, M. Hirai, T. J.M. Symons, G. F. Krebs, J. R. Alonso, S. Y. Zhu, J. Z. Zhu, Y. J. Xu

SCI - Physics

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The nuclear spin alignments of the β-emitting fragments ¹²B(I^π = 1⁺, T_1/2 = 20.2 ms) and ¹³B(I^π = 3/2^-, T_1/2 = 17.4 ms) produced in the 100A-MeV ¹³C, ¹⁵N + ⁹Be collisions respectively have been observed for the first time detecting asymmetric β-ray emission from these nuclei. By means of the spin manipulation technique based on the hyperfine interaction of B isotopes in TiO₂, both the polarization P and the alignment A were determined reliably. The obtained P and A were significantly smaller than the expectation from the kinematical model. From the fact that the quenching factors for P and A are almost the same, there may be some depolarization mechanism in the collision process itself.

Original language	English
Pages (from-to)	233-237
Number of pages	5
Journal	Hyperfine Interactions
Volume	136-137
Issue number	3-8
DOIs	https://doi.org/10.1023/a:1020554331850
Publication status	Published - 2001

Keywords

Nuclear spin orientation
Polarized nuclear beam
Projectile fragmentation
Reaction mechanism
β-NMR

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics
Condensed Matter Physics
Physical and Theoretical Chemistry

Access to Document

10.1023/a:1020554331850

Cite this

Nagatomo, T., Matsuta, K., Hashimoto, K., Ota, M., Arimura, K., Minamisono, K., Sumikama, T., Ogura, M., Iwakoshi, T., Miyake, T., Kudo, S., Akutsu, K., Minamisono, T., Fukuda, M., Mihara, M., Momota, S., Nojiri, Y., Kitagawa, A., Torikoshi, M., ... Xu, Y. J. (2001). Nuclear spin alignment of ^12,13B produced in heavy ion collisions. Hyperfine Interactions, 136-137(3-8), 233-237. https://doi.org/10.1023/a:1020554331850

Nuclear spin alignment of ^12,13B produced in heavy ion collisions. / Nagatomo, T.; Matsuta, K.; Hashimoto, K.; Ota, M.; Arimura, K.; Minamisono, K.; Sumikama, T.; Ogura, M.; Iwakoshi, T.; Miyake, T.; Kudo, S.; Akutsu, K.; Minamisono, T.; Fukuda, M.; Mihara, M.; Momota, S.; Nojiri, Y.; Kitagawa, A.; Torikoshi, M.; Kanazawa, M.; Suda, M.; Hirai, M.; Symons, T. J.M.; Krebs, G. F.; Alonso, J. R.; Zhu, S. Y.; Zhu, J. Z.; Xu, Y. J.

In: Hyperfine Interactions, Vol. 136-137, No. 3-8, 2001, p. 233-237.

Research output: Contribution to journal › Article › peer-review

Nagatomo, T, Matsuta, K, Hashimoto, K, Ota, M, Arimura, K, Minamisono, K, Sumikama, T, Ogura, M, Iwakoshi, T, Miyake, T, Kudo, S, Akutsu, K, Minamisono, T, Fukuda, M, Mihara, M, Momota, S, Nojiri, Y, Kitagawa, A, Torikoshi, M, Kanazawa, M, Suda, M, Hirai, M, Symons, TJM, Krebs, GF, Alonso, JR, Zhu, SY, Zhu, JZ & Xu, YJ 2001, 'Nuclear spin alignment of ^12,13B produced in heavy ion collisions', Hyperfine Interactions, vol. 136-137, no. 3-8, pp. 233-237. https://doi.org/10.1023/a:1020554331850

Nagatomo, T. ; Matsuta, K. ; Hashimoto, K. ; Ota, M. ; Arimura, K. ; Minamisono, K. ; Sumikama, T. ; Ogura, M. ; Iwakoshi, T. ; Miyake, T. ; Kudo, S. ; Akutsu, K. ; Minamisono, T. ; Fukuda, M. ; Mihara, M. ; Momota, S. ; Nojiri, Y. ; Kitagawa, A. ; Torikoshi, M. ; Kanazawa, M. ; Suda, M. ; Hirai, M. ; Symons, T. J.M. ; Krebs, G. F. ; Alonso, J. R. ; Zhu, S. Y. ; Zhu, J. Z. ; Xu, Y. J. / Nuclear spin alignment of ^12,13B produced in heavy ion collisions. In: Hyperfine Interactions. 2001 ; Vol. 136-137, No. 3-8. pp. 233-237.

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title = "Nuclear spin alignment of 12,13B produced in heavy ion collisions",

abstract = "The nuclear spin alignments of the β-emitting fragments 12B(Iπ = 1+, T1/2 = 20.2 ms) and 13B(Iπ = 3/2-, T1/2 = 17.4 ms) produced in the 100A-MeV 13C, 15N + 9Be collisions respectively have been observed for the first time detecting asymmetric β-ray emission from these nuclei. By means of the spin manipulation technique based on the hyperfine interaction of B isotopes in TiO2, both the polarization P and the alignment A were determined reliably. The obtained P and A were significantly smaller than the expectation from the kinematical model. From the fact that the quenching factors for P and A are almost the same, there may be some depolarization mechanism in the collision process itself.",

keywords = "Nuclear spin orientation, Polarized nuclear beam, Projectile fragmentation, Reaction mechanism, β-NMR",

author = "T. Nagatomo and K. Matsuta and K. Hashimoto and M. Ota and K. Arimura and K. Minamisono and T. Sumikama and M. Ogura and T. Iwakoshi and T. Miyake and S. Kudo and K. Akutsu and T. Minamisono and M. Fukuda and M. Mihara and S. Momota and Y. Nojiri and A. Kitagawa and M. Torikoshi and M. Kanazawa and M. Suda and M. Hirai and Symons, {T. J.M.} and Krebs, {G. F.} and Alonso, {J. R.} and Zhu, {S. Y.} and Zhu, {J. Z.} and Xu, {Y. J.}",

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AU - Nagatomo, T.

AU - Matsuta, K.

AU - Hashimoto, K.

AU - Ota, M.

AU - Arimura, K.

AU - Minamisono, K.

AU - Sumikama, T.

AU - Ogura, M.

AU - Iwakoshi, T.

AU - Miyake, T.

AU - Kudo, S.

AU - Akutsu, K.

AU - Minamisono, T.

AU - Fukuda, M.

AU - Mihara, M.

AU - Momota, S.

AU - Nojiri, Y.

AU - Kitagawa, A.

AU - Torikoshi, M.

AU - Kanazawa, M.

AU - Suda, M.

AU - Hirai, M.

AU - Symons, T. J.M.

AU - Krebs, G. F.

AU - Alonso, J. R.

AU - Zhu, S. Y.

AU - Zhu, J. Z.

AU - Xu, Y. J.

PY - 2001

Y1 - 2001

N2 - The nuclear spin alignments of the β-emitting fragments 12B(Iπ = 1+, T1/2 = 20.2 ms) and 13B(Iπ = 3/2-, T1/2 = 17.4 ms) produced in the 100A-MeV 13C, 15N + 9Be collisions respectively have been observed for the first time detecting asymmetric β-ray emission from these nuclei. By means of the spin manipulation technique based on the hyperfine interaction of B isotopes in TiO2, both the polarization P and the alignment A were determined reliably. The obtained P and A were significantly smaller than the expectation from the kinematical model. From the fact that the quenching factors for P and A are almost the same, there may be some depolarization mechanism in the collision process itself.

AB - The nuclear spin alignments of the β-emitting fragments 12B(Iπ = 1+, T1/2 = 20.2 ms) and 13B(Iπ = 3/2-, T1/2 = 17.4 ms) produced in the 100A-MeV 13C, 15N + 9Be collisions respectively have been observed for the first time detecting asymmetric β-ray emission from these nuclei. By means of the spin manipulation technique based on the hyperfine interaction of B isotopes in TiO2, both the polarization P and the alignment A were determined reliably. The obtained P and A were significantly smaller than the expectation from the kinematical model. From the fact that the quenching factors for P and A are almost the same, there may be some depolarization mechanism in the collision process itself.

KW - Nuclear spin orientation

KW - Polarized nuclear beam

KW - Projectile fragmentation

KW - Reaction mechanism

KW - β-NMR

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