Exotic cluster states in 12Be via α-inelastic scattering

A. Saito, S. Shimoura, T. Minemura, Y. U. Matsuyama, H. Baba, N. Aoi, T. Gomi, H. Higurashi, K. Ieki, N. Imai, N. Iwasa, H. Iwasaki, S. Kanno, S. Kubono, M. Kunibu, S. Michimasa, T. Motobayashi, T. Nakamura, H. Ryuto, H. SakuraiM. Serata, E. Takeshita, S. Takeuchi, Takashi Teranishi, K. Ue, K. Yamada, Y. Yanagisawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

Excited states in the neutron-rich nucleus 12Be were experimentally investigated via α-inelastic scattering. The excited states in the 12Be nucleus were populated by a 12Be(α, α′) reaction at 60 A MeV in the inverse kinematics, and identified by measuring a 6He+6He breakup channel in coincidence. The differential cross section and the angular correlations between the decay particles were obtained for each excitation energy from 10 MeV to 20 MeV, reconstructed by the measured momentum vectors of the two 6He's. A multipole decomposition analysis based on the distorted-wave Born approximation was applied for the angular distribution of the inelastic scattering together with the angular correlation between the decay particles with respect to the directions of the incident beam and to the momentum transfer simultaneously. From the decomposed excitation energy spectra for L=0, 2, and 4, new excited states with Jπ=0+ and Jπ=2+ were identified, which were candidates of the band-head of a largely deformed rotational band. According to their similar energy spacings in J=0 and J=2 energy spectra, these excited states were possibly forming rotational bands with almost same large moments of inertia. The structures of the observed states are discussed with predictions of theoretical models.

Original languageEnglish
Title of host publicationTOURS SYMPOSIUM ON NUCLEAR PHYSICS VI
Pages205-213
Number of pages9
DOIs
Publication statusPublished - Apr 4 2007
EventTOURS SYMPOSIUM ON NUCLEAR PHYSICS VI - Tours, France
Duration: Sep 5 2006Sep 8 2006

Publication series

NameAIP Conference Proceedings
Volume891
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherTOURS SYMPOSIUM ON NUCLEAR PHYSICS VI
CountryFrance
CityTours
Period9/5/069/8/06

Fingerprint

inelastic scattering
scattering
energy
momentum
excitation
particle decay
deterioration
Born approximation
angular correlation
decomposition analysis
momentum transfer
energy spectra
kinematics
inertia
inverse kinematics
spacing
nuclei
cross section
spatial distribution
moments of inertia

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Saito, A., Shimoura, S., Minemura, T., Matsuyama, Y. U., Baba, H., Aoi, N., ... Yanagisawa, Y. (2007). Exotic cluster states in 12Be via α-inelastic scattering. In TOURS SYMPOSIUM ON NUCLEAR PHYSICS VI (pp. 205-213). (AIP Conference Proceedings; Vol. 891). https://doi.org/10.1063/1.2713519

Exotic cluster states in 12Be via α-inelastic scattering. / Saito, A.; Shimoura, S.; Minemura, T.; Matsuyama, Y. U.; Baba, H.; Aoi, N.; Gomi, T.; Higurashi, H.; Ieki, K.; Imai, N.; Iwasa, N.; Iwasaki, H.; Kanno, S.; Kubono, S.; Kunibu, M.; Michimasa, S.; Motobayashi, T.; Nakamura, T.; Ryuto, H.; Sakurai, H.; Serata, M.; Takeshita, E.; Takeuchi, S.; Teranishi, Takashi; Ue, K.; Yamada, K.; Yanagisawa, Y.

TOURS SYMPOSIUM ON NUCLEAR PHYSICS VI. 2007. p. 205-213 (AIP Conference Proceedings; Vol. 891).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Saito, A, Shimoura, S, Minemura, T, Matsuyama, YU, Baba, H, Aoi, N, Gomi, T, Higurashi, H, Ieki, K, Imai, N, Iwasa, N, Iwasaki, H, Kanno, S, Kubono, S, Kunibu, M, Michimasa, S, Motobayashi, T, Nakamura, T, Ryuto, H, Sakurai, H, Serata, M, Takeshita, E, Takeuchi, S, Teranishi, T, Ue, K, Yamada, K & Yanagisawa, Y 2007, Exotic cluster states in 12Be via α-inelastic scattering. in TOURS SYMPOSIUM ON NUCLEAR PHYSICS VI. AIP Conference Proceedings, vol. 891, pp. 205-213, TOURS SYMPOSIUM ON NUCLEAR PHYSICS VI, Tours, France, 9/5/06. https://doi.org/10.1063/1.2713519
Saito A, Shimoura S, Minemura T, Matsuyama YU, Baba H, Aoi N et al. Exotic cluster states in 12Be via α-inelastic scattering. In TOURS SYMPOSIUM ON NUCLEAR PHYSICS VI. 2007. p. 205-213. (AIP Conference Proceedings). https://doi.org/10.1063/1.2713519
Saito, A. ; Shimoura, S. ; Minemura, T. ; Matsuyama, Y. U. ; Baba, H. ; Aoi, N. ; Gomi, T. ; Higurashi, H. ; Ieki, K. ; Imai, N. ; Iwasa, N. ; Iwasaki, H. ; Kanno, S. ; Kubono, S. ; Kunibu, M. ; Michimasa, S. ; Motobayashi, T. ; Nakamura, T. ; Ryuto, H. ; Sakurai, H. ; Serata, M. ; Takeshita, E. ; Takeuchi, S. ; Teranishi, Takashi ; Ue, K. ; Yamada, K. ; Yanagisawa, Y. / Exotic cluster states in 12Be via α-inelastic scattering. TOURS SYMPOSIUM ON NUCLEAR PHYSICS VI. 2007. pp. 205-213 (AIP Conference Proceedings).
@inproceedings{05349fface8a45f5bd55e946bd5da4d6,
title = "Exotic cluster states in 12Be via α-inelastic scattering",
abstract = "Excited states in the neutron-rich nucleus 12Be were experimentally investigated via α-inelastic scattering. The excited states in the 12Be nucleus were populated by a 12Be(α, α′) reaction at 60 A MeV in the inverse kinematics, and identified by measuring a 6He+6He breakup channel in coincidence. The differential cross section and the angular correlations between the decay particles were obtained for each excitation energy from 10 MeV to 20 MeV, reconstructed by the measured momentum vectors of the two 6He's. A multipole decomposition analysis based on the distorted-wave Born approximation was applied for the angular distribution of the inelastic scattering together with the angular correlation between the decay particles with respect to the directions of the incident beam and to the momentum transfer simultaneously. From the decomposed excitation energy spectra for L=0, 2, and 4, new excited states with Jπ=0+ and Jπ=2+ were identified, which were candidates of the band-head of a largely deformed rotational band. According to their similar energy spacings in J=0 and J=2 energy spectra, these excited states were possibly forming rotational bands with almost same large moments of inertia. The structures of the observed states are discussed with predictions of theoretical models.",
author = "A. Saito and S. Shimoura and T. Minemura and Matsuyama, {Y. U.} and H. Baba and N. Aoi and T. Gomi and H. Higurashi and K. Ieki and N. Imai and N. Iwasa and H. Iwasaki and S. Kanno and S. Kubono and M. Kunibu and S. Michimasa and T. Motobayashi and T. Nakamura and H. Ryuto and H. Sakurai and M. Serata and E. Takeshita and S. Takeuchi and Takashi Teranishi and K. Ue and K. Yamada and Y. Yanagisawa",
year = "2007",
month = "4",
day = "4",
doi = "10.1063/1.2713519",
language = "English",
isbn = "0735403953",
series = "AIP Conference Proceedings",
pages = "205--213",
booktitle = "TOURS SYMPOSIUM ON NUCLEAR PHYSICS VI",

}

TY - GEN

T1 - Exotic cluster states in 12Be via α-inelastic scattering

AU - Saito, A.

AU - Shimoura, S.

AU - Minemura, T.

AU - Matsuyama, Y. U.

AU - Baba, H.

AU - Aoi, N.

AU - Gomi, T.

AU - Higurashi, H.

AU - Ieki, K.

AU - Imai, N.

AU - Iwasa, N.

AU - Iwasaki, H.

AU - Kanno, S.

AU - Kubono, S.

AU - Kunibu, M.

AU - Michimasa, S.

AU - Motobayashi, T.

AU - Nakamura, T.

AU - Ryuto, H.

AU - Sakurai, H.

AU - Serata, M.

AU - Takeshita, E.

AU - Takeuchi, S.

AU - Teranishi, Takashi

AU - Ue, K.

AU - Yamada, K.

AU - Yanagisawa, Y.

PY - 2007/4/4

Y1 - 2007/4/4

N2 - Excited states in the neutron-rich nucleus 12Be were experimentally investigated via α-inelastic scattering. The excited states in the 12Be nucleus were populated by a 12Be(α, α′) reaction at 60 A MeV in the inverse kinematics, and identified by measuring a 6He+6He breakup channel in coincidence. The differential cross section and the angular correlations between the decay particles were obtained for each excitation energy from 10 MeV to 20 MeV, reconstructed by the measured momentum vectors of the two 6He's. A multipole decomposition analysis based on the distorted-wave Born approximation was applied for the angular distribution of the inelastic scattering together with the angular correlation between the decay particles with respect to the directions of the incident beam and to the momentum transfer simultaneously. From the decomposed excitation energy spectra for L=0, 2, and 4, new excited states with Jπ=0+ and Jπ=2+ were identified, which were candidates of the band-head of a largely deformed rotational band. According to their similar energy spacings in J=0 and J=2 energy spectra, these excited states were possibly forming rotational bands with almost same large moments of inertia. The structures of the observed states are discussed with predictions of theoretical models.

AB - Excited states in the neutron-rich nucleus 12Be were experimentally investigated via α-inelastic scattering. The excited states in the 12Be nucleus were populated by a 12Be(α, α′) reaction at 60 A MeV in the inverse kinematics, and identified by measuring a 6He+6He breakup channel in coincidence. The differential cross section and the angular correlations between the decay particles were obtained for each excitation energy from 10 MeV to 20 MeV, reconstructed by the measured momentum vectors of the two 6He's. A multipole decomposition analysis based on the distorted-wave Born approximation was applied for the angular distribution of the inelastic scattering together with the angular correlation between the decay particles with respect to the directions of the incident beam and to the momentum transfer simultaneously. From the decomposed excitation energy spectra for L=0, 2, and 4, new excited states with Jπ=0+ and Jπ=2+ were identified, which were candidates of the band-head of a largely deformed rotational band. According to their similar energy spacings in J=0 and J=2 energy spectra, these excited states were possibly forming rotational bands with almost same large moments of inertia. The structures of the observed states are discussed with predictions of theoretical models.

UR - http://www.scopus.com/inward/record.url?scp=33947714091&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33947714091&partnerID=8YFLogxK

U2 - 10.1063/1.2713519

DO - 10.1063/1.2713519

M3 - Conference contribution

AN - SCOPUS:33947714091

SN - 0735403953

SN - 9780735403956

T3 - AIP Conference Proceedings

SP - 205

EP - 213

BT - TOURS SYMPOSIUM ON NUCLEAR PHYSICS VI

ER -