Line-shape analysis of Doppler-broadened gamma lines following the beta decay of Li-11

C. M. Mattoon; F. Sarazin; C. Andreoiu; A. N. Andreyev; R. A. E. Austin; G. C. Ball; R. S. Chakrawarthy; D. Cross; E. S. Cunningham; J. Daoud; P. E. Garrett; G. F. Grinyer; G. Hackman; D. Melconian; C. Morton; C. Pearson; J. J. Ressler; J. Schwarzenberg; M. B. Smith; C. E. Svensson

doi:10.1103/PhysRevC.80.034318

Line-shape analysis of Doppler-broadened gamma lines following the beta decay of Li-11

C. M. Mattoon, F. Sarazin^*, C. Andreoiu, A. N. Andreyev, R. A. E. Austin, G. C. Ball, R. S. Chakrawarthy, D. Cross, E. S. Cunningham, J. Daoud, P. E. Garrett, G. F. Grinyer, G. Hackman, D. Melconian, C. Morton, C. Pearson, J. J. Ressler, J. Schwarzenberg, M. B. Smith, C. E. Svensson

^*Corresponding author for this work

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

Abstract

The beta decay of Li-11 is studied at the TRIUMF Isotope Separation and Acceleration (ISAC) facility using the 8 pi gamma-ray spectrometer coupled with an inner array of 20 plastic scintillators for beta detection. Doppler-broadened line shapes resulting from the decay of the excited states in Be-10 populated by beta-delayed one-neutron emission are analyzed using Monte Carlo simulations. New beta-delayed neutron decay branches are shown to contribute to the complex decay of Li-11. The half-lives of all but one bound excited state in Be-10 are also deduced from this work. Among them, the half-life of the 2(-) state in Be-10 is shown to be much shorter than previously thought, yielding a new experimental B(E1) now well within the range of theoretical predictions and providing further evidence that the 2(-) state in Be-10 is an excited halo state. The nature of the 8.82-MeV state in Be-11 and its decay paths to excited states in Be-10 are found to be consistent with the beta decay of the core proceeding through this particular state.

Original language	English
Article number	ARTN 034318
Number of pages	13
Journal	Physical Review C
Volume	80
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.80.034318
Publication status	Published - 23 Sept 2009

Keywords

LIGHT-NUCLEI
SPECTROSCOPY
ENERGY-LEVELS
RADII
BE-11
POLARIZED LI-11
INTERACTION CROSS-SECTIONS
HALO STRUCTURE
18 MEV STATE

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Mattoon, C. M., Sarazin, F., Andreoiu, C., Andreyev, A. N., Austin, R. A. E., Ball, G. C., Chakrawarthy, R. S., Cross, D., Cunningham, E. S., Daoud, J., Garrett, P. E., Grinyer, G. F., Hackman, G., Melconian, D., Morton, C., Pearson, C., Ressler, J. J., Schwarzenberg, J., Smith, M. B., & Svensson, C. E. (2009). Line-shape analysis of Doppler-broadened gamma lines following the beta decay of Li-11. Physical Review C, 80(3), Article ARTN 034318. https://doi.org/10.1103/PhysRevC.80.034318

@article{7fea7fca30824b42b7469c07ebaa1110,

title = "Line-shape analysis of Doppler-broadened gamma lines following the beta decay of Li-11",

abstract = "The beta decay of Li-11 is studied at the TRIUMF Isotope Separation and Acceleration (ISAC) facility using the 8 pi gamma-ray spectrometer coupled with an inner array of 20 plastic scintillators for beta detection. Doppler-broadened line shapes resulting from the decay of the excited states in Be-10 populated by beta-delayed one-neutron emission are analyzed using Monte Carlo simulations. New beta-delayed neutron decay branches are shown to contribute to the complex decay of Li-11. The half-lives of all but one bound excited state in Be-10 are also deduced from this work. Among them, the half-life of the 2(-) state in Be-10 is shown to be much shorter than previously thought, yielding a new experimental B(E1) now well within the range of theoretical predictions and providing further evidence that the 2(-) state in Be-10 is an excited halo state. The nature of the 8.82-MeV state in Be-11 and its decay paths to excited states in Be-10 are found to be consistent with the beta decay of the core proceeding through this particular state.",

keywords = "LIGHT-NUCLEI, SPECTROSCOPY, ENERGY-LEVELS, RADII, BE-11, POLARIZED LI-11, INTERACTION CROSS-SECTIONS, HALO STRUCTURE, 18 MEV STATE",

author = "Mattoon, {C. M.} and F. Sarazin and C. Andreoiu and Andreyev, {A. N.} and Austin, {R. A. E.} and Ball, {G. C.} and Chakrawarthy, {R. S.} and D. Cross and Cunningham, {E. S.} and J. Daoud and Garrett, {P. E.} and Grinyer, {G. F.} and G. Hackman and D. Melconian and C. Morton and C. Pearson and Ressler, {J. J.} and J. Schwarzenberg and Smith, {M. B.} and Svensson, {C. E.}",

year = "2009",

month = sep,

day = "23",

doi = "10.1103/PhysRevC.80.034318",

language = "English",

volume = "80",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

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Mattoon, CM, Sarazin, F, Andreoiu, C, Andreyev, AN, Austin, RAE, Ball, GC, Chakrawarthy, RS, Cross, D, Cunningham, ES, Daoud, J, Garrett, PE, Grinyer, GF, Hackman, G, Melconian, D, Morton, C, Pearson, C, Ressler, JJ, Schwarzenberg, J, Smith, MB & Svensson, CE 2009, 'Line-shape analysis of Doppler-broadened gamma lines following the beta decay of Li-11', Physical Review C, vol. 80, no. 3, ARTN 034318. https://doi.org/10.1103/PhysRevC.80.034318

TY - JOUR

T1 - Line-shape analysis of Doppler-broadened gamma lines following the beta decay of Li-11

AU - Mattoon, C. M.

AU - Sarazin, F.

AU - Andreoiu, C.

AU - Andreyev, A. N.

AU - Austin, R. A. E.

AU - Ball, G. C.

AU - Chakrawarthy, R. S.

AU - Cross, D.

AU - Cunningham, E. S.

AU - Daoud, J.

AU - Garrett, P. E.

AU - Grinyer, G. F.

AU - Hackman, G.

AU - Melconian, D.

AU - Morton, C.

AU - Pearson, C.

AU - Ressler, J. J.

AU - Schwarzenberg, J.

AU - Smith, M. B.

AU - Svensson, C. E.

PY - 2009/9/23

Y1 - 2009/9/23

N2 - The beta decay of Li-11 is studied at the TRIUMF Isotope Separation and Acceleration (ISAC) facility using the 8 pi gamma-ray spectrometer coupled with an inner array of 20 plastic scintillators for beta detection. Doppler-broadened line shapes resulting from the decay of the excited states in Be-10 populated by beta-delayed one-neutron emission are analyzed using Monte Carlo simulations. New beta-delayed neutron decay branches are shown to contribute to the complex decay of Li-11. The half-lives of all but one bound excited state in Be-10 are also deduced from this work. Among them, the half-life of the 2(-) state in Be-10 is shown to be much shorter than previously thought, yielding a new experimental B(E1) now well within the range of theoretical predictions and providing further evidence that the 2(-) state in Be-10 is an excited halo state. The nature of the 8.82-MeV state in Be-11 and its decay paths to excited states in Be-10 are found to be consistent with the beta decay of the core proceeding through this particular state.

AB - The beta decay of Li-11 is studied at the TRIUMF Isotope Separation and Acceleration (ISAC) facility using the 8 pi gamma-ray spectrometer coupled with an inner array of 20 plastic scintillators for beta detection. Doppler-broadened line shapes resulting from the decay of the excited states in Be-10 populated by beta-delayed one-neutron emission are analyzed using Monte Carlo simulations. New beta-delayed neutron decay branches are shown to contribute to the complex decay of Li-11. The half-lives of all but one bound excited state in Be-10 are also deduced from this work. Among them, the half-life of the 2(-) state in Be-10 is shown to be much shorter than previously thought, yielding a new experimental B(E1) now well within the range of theoretical predictions and providing further evidence that the 2(-) state in Be-10 is an excited halo state. The nature of the 8.82-MeV state in Be-11 and its decay paths to excited states in Be-10 are found to be consistent with the beta decay of the core proceeding through this particular state.

KW - LIGHT-NUCLEI

KW - SPECTROSCOPY

KW - ENERGY-LEVELS

KW - RADII

KW - BE-11

KW - POLARIZED LI-11

KW - INTERACTION CROSS-SECTIONS

KW - HALO STRUCTURE

KW - 18 MEV STATE

UR - http://www.scopus.com/inward/record.url?scp=70349863006&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.80.034318

DO - 10.1103/PhysRevC.80.034318

M3 - Article

SN - 0556-2813

VL - 80

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - ARTN 034318

ER -

Line-shape analysis of Doppler-broadened gamma lines following the beta decay of Li-11

Abstract

Keywords

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