Three-centre cluster structure in C-11 and B-11

N Soic; M Freer; L Donadille; N M Clarke; P J Leask; W N Catford; K L Jones; D Mahboub; B R Fulton; B J Greenhalgh; D L Watson; D C Weisser

doi:10.1088/0954-3899/31/10/057

Three-centre cluster structure in C-11 and B-11

N Soic, M Freer, L Donadille, N M Clarke, P J Leask, W N Catford, K L Jones, D Mahboub, B R Fulton, B J Greenhalgh, D L Watson, D C Weisser

Physics

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

Abstract

Studies of the O-16(Be-9,alpha Be-7) C-14, Li-7(9Be, alpha Li-7)He-5 and Li-7(Be-9,alpha alpha t)He-5 reactions at E-beam = 70 and 55 MeV have been performed using resonant particle spectroscopy techniques. The C-11 excited states decaying into alpha+Be-7(gs) are observed between 8.5 and 13.5 MeV. The alpha+Li-7(gs), alpha+Li-7* (4.652 MeV) and t+Be-8(gs) decays of B-11 excited states between 9 and 19 MeV are observed. The decay processes are used to indicate the possible three-centre 2 alpha + He-3 (2 alpha + H-3) cluster structure of observed states. This cluster structure is more prominent in the positive-parity states, where two rotational bands with large deformations are suggested.. Excitations of some of the observed T = 1/2 resonances coincide with the energies of previously measured T = 3/2 isobaric analogues of the Be-11 states, indicating that these states may have mixed isospin.

Original language	English
Pages (from-to)	S1701-S1704
Number of pages	4
Journal	Journal of physics g-Nuclear and particle physics
Volume	31
Issue number	10
DOIs	https://doi.org/10.1088/0954-3899/31/10/057
Publication status	Published - Oct 2005

Keywords

STATES
BE-10

Access to Document

10.1088/0954-3899/31/10/057

Cite this

@article{aa24fab449414a32bb3db1d49383affb,

title = "Three-centre cluster structure in C-11 and B-11",

abstract = "Studies of the O-16(Be-9,alpha Be-7) C-14, Li-7(9Be, alpha Li-7)He-5 and Li-7(Be-9,alpha alpha t)He-5 reactions at E-beam = 70 and 55 MeV have been performed using resonant particle spectroscopy techniques. The C-11 excited states decaying into alpha+Be-7(gs) are observed between 8.5 and 13.5 MeV. The alpha+Li-7(gs), alpha+Li-7* (4.652 MeV) and t+Be-8(gs) decays of B-11 excited states between 9 and 19 MeV are observed. The decay processes are used to indicate the possible three-centre 2 alpha + He-3 (2 alpha + H-3) cluster structure of observed states. This cluster structure is more prominent in the positive-parity states, where two rotational bands with large deformations are suggested.. Excitations of some of the observed T = 1/2 resonances coincide with the energies of previously measured T = 3/2 isobaric analogues of the Be-11 states, indicating that these states may have mixed isospin.",

keywords = "STATES, BE-10",

author = "N Soic and M Freer and L Donadille and Clarke, {N M} and Leask, {P J} and Catford, {W N} and Jones, {K L} and D Mahboub and Fulton, {B R} and Greenhalgh, {B J} and Watson, {D L} and Weisser, {D C}",

year = "2005",

month = oct,

doi = "10.1088/0954-3899/31/10/057",

language = "English",

volume = "31",

pages = "S1701--S1704",

journal = "Journal of physics g-Nuclear and particle physics",

issn = "0954-3899",

publisher = "IOP Publishing Ltd.",

number = "10",

}

TY - JOUR

T1 - Three-centre cluster structure in C-11 and B-11

AU - Soic, N

AU - Freer, M

AU - Donadille, L

AU - Clarke, N M

AU - Leask, P J

AU - Catford, W N

AU - Jones, K L

AU - Mahboub, D

AU - Fulton, B R

AU - Greenhalgh, B J

AU - Watson, D L

AU - Weisser, D C

PY - 2005/10

Y1 - 2005/10

N2 - Studies of the O-16(Be-9,alpha Be-7) C-14, Li-7(9Be, alpha Li-7)He-5 and Li-7(Be-9,alpha alpha t)He-5 reactions at E-beam = 70 and 55 MeV have been performed using resonant particle spectroscopy techniques. The C-11 excited states decaying into alpha+Be-7(gs) are observed between 8.5 and 13.5 MeV. The alpha+Li-7(gs), alpha+Li-7* (4.652 MeV) and t+Be-8(gs) decays of B-11 excited states between 9 and 19 MeV are observed. The decay processes are used to indicate the possible three-centre 2 alpha + He-3 (2 alpha + H-3) cluster structure of observed states. This cluster structure is more prominent in the positive-parity states, where two rotational bands with large deformations are suggested.. Excitations of some of the observed T = 1/2 resonances coincide with the energies of previously measured T = 3/2 isobaric analogues of the Be-11 states, indicating that these states may have mixed isospin.

AB - Studies of the O-16(Be-9,alpha Be-7) C-14, Li-7(9Be, alpha Li-7)He-5 and Li-7(Be-9,alpha alpha t)He-5 reactions at E-beam = 70 and 55 MeV have been performed using resonant particle spectroscopy techniques. The C-11 excited states decaying into alpha+Be-7(gs) are observed between 8.5 and 13.5 MeV. The alpha+Li-7(gs), alpha+Li-7* (4.652 MeV) and t+Be-8(gs) decays of B-11 excited states between 9 and 19 MeV are observed. The decay processes are used to indicate the possible three-centre 2 alpha + He-3 (2 alpha + H-3) cluster structure of observed states. This cluster structure is more prominent in the positive-parity states, where two rotational bands with large deformations are suggested.. Excitations of some of the observed T = 1/2 resonances coincide with the energies of previously measured T = 3/2 isobaric analogues of the Be-11 states, indicating that these states may have mixed isospin.

KW - STATES

KW - BE-10

U2 - 10.1088/0954-3899/31/10/057

DO - 10.1088/0954-3899/31/10/057

M3 - Article

SN - 0954-3899

VL - 31

SP - S1701-S1704

JO - Journal of physics g-Nuclear and particle physics

JF - Journal of physics g-Nuclear and particle physics

IS - 10

ER -