Conversion electrons from high-statistics β-decay measurements with the 8π spectrometer at TRIUMF-ISAC

P. E. Garrett; B. Jigmeddorj; A. J. Radich; C. Andreoiu; G. C. Ball; J. C. Bangay; L. Bianco; V. Bildstein; S. Chagnon-Lessard; D. S. Cross; G. A. Demand; A. Diaz Varela; R. Dunlop; P. Finlay; A. B. Garnsworthy; K. L. Green; G. Hackman; B. Hadinia; K. G. Leach; J. Michetti-Wilson; J. N. Orce; M. M. Rajabali; E. T. Rand; K. Starosta; C. Sumithrarachchi; C. E. Svensson; S. Triambak; Z. M. Wang; S. J. Williams; J. L. Wood; J. Wong; S. W. Yates; E. F. Zganjar

doi:10.1051/epjconf/201612302005

Conversion electrons from high-statistics β-decay measurements with the 8π spectrometer at TRIUMF-ISAC

P. E. Garrett, B. Jigmeddorj, A. J. Radich, C. Andreoiu, G. C. Ball, J. C. Bangay, L. Bianco, V. Bildstein, S. Chagnon-Lessard, D. S. Cross, G. A. Demand, A. Diaz Varela, R. Dunlop, P. Finlay, A. B. Garnsworthy, K. L. Green, G. Hackman, B. Hadinia, K. G. Leach, J. Michetti-WilsonJ. N. Orce, M. M. Rajabali, E. T. Rand, K. Starosta, C. Sumithrarachchi, C. E. Svensson, S. Triambak, Z. M. Wang, S. J. Williams, J. L. Wood, J. Wong, S. W. Yates, E. F. Zganjar

Chemistry

Research output: Contribution to journal › Conference article › peer-review

4 Scopus citations

Abstract

The 8π spectrometer, located at TRIUMF-ISAC, was the world's most powerful spectrometer dedicated to β-decay studies until its decommissioning in early 2014 for replacement with the GRIFFIN array. An integral part of the 8π spectrometer was the Pentagonal Array for Conversion Electron Spectroscopy (PACES) consisting of 5 Si(Li) detectors used for charged-particle detection. PACES enabled both γ - e^- and e^- - e^- coincidence measurements, which were crucial for increasing the sensitivity for discrete e^- lines in the presence of large backgrounds. Examples from a ¹²⁴Cs decay experiment, where the data were vital for the expansion of the ¹²⁴Cs^m decay scheme, are shown. With sufficient statistics, measurements of conversion coefficients can be used to extract the E0 components of J^π → J^π transitions for J ≠ 0, which is demonstrated for data obtained in ¹¹⁰In→¹¹⁰Cd decay. With knowledge of the shapes of the states involved, as obtained, for example, from the use of Kumar-Cline shape invariants, the mixing of the states can be extracted.

Original language	English
Article number	02005
Journal	EPJ Web of Conferences
Volume	123
DOIs	https://doi.org/10.1051/epjconf/201612302005
State	Published - Sep 5 2016
Event	2015 Heavy Ion Accelerator Symposium, HIAS 2015 - Canberra, Australia Duration: Sep 14 2015 → Sep 18 2015

Bibliographical note

Publisher Copyright:
© The Authors, published by EDP Sciences.

ASJC Scopus subject areas

General Physics and Astronomy

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10.1051/epjconf/201612302005

Cite this

Garrett, P. E., Jigmeddorj, B., Radich, A. J., Andreoiu, C., Ball, G. C., Bangay, J. C., Bianco, L., Bildstein, V., Chagnon-Lessard, S., Cross, D. S., Demand, G. A., Varela, A. D., Dunlop, R., Finlay, P., Garnsworthy, A. B., Green, K. L., Hackman, G., Hadinia, B., Leach, K. G., ... Zganjar, E. F. (2016). Conversion electrons from high-statistics β-decay measurements with the 8π spectrometer at TRIUMF-ISAC. EPJ Web of Conferences, 123, Article 02005. https://doi.org/10.1051/epjconf/201612302005

@article{fbfd3be8380f4bc9a42f5d18a2c5b505,

title = "Conversion electrons from high-statistics β-decay measurements with the 8π spectrometer at TRIUMF-ISAC",

abstract = "The 8π spectrometer, located at TRIUMF-ISAC, was the world's most powerful spectrometer dedicated to β-decay studies until its decommissioning in early 2014 for replacement with the GRIFFIN array. An integral part of the 8π spectrometer was the Pentagonal Array for Conversion Electron Spectroscopy (PACES) consisting of 5 Si(Li) detectors used for charged-particle detection. PACES enabled both γ - e- and e- - e- coincidence measurements, which were crucial for increasing the sensitivity for discrete e- lines in the presence of large backgrounds. Examples from a 124Cs decay experiment, where the data were vital for the expansion of the 124Csm decay scheme, are shown. With sufficient statistics, measurements of conversion coefficients can be used to extract the E0 components of Jπ → Jπ transitions for J ≠ 0, which is demonstrated for data obtained in 110In→110Cd decay. With knowledge of the shapes of the states involved, as obtained, for example, from the use of Kumar-Cline shape invariants, the mixing of the states can be extracted.",

author = "Garrett, {P. E.} and B. Jigmeddorj and Radich, {A. J.} and C. Andreoiu and Ball, {G. C.} and Bangay, {J. C.} and L. Bianco and V. Bildstein and S. Chagnon-Lessard and Cross, {D. S.} and Demand, {G. A.} and Varela, {A. Diaz} and R. Dunlop and P. Finlay and Garnsworthy, {A. B.} and Green, {K. L.} and G. Hackman and B. Hadinia and Leach, {K. G.} and J. Michetti-Wilson and Orce, {J. N.} and Rajabali, {M. M.} and Rand, {E. T.} and K. Starosta and C. Sumithrarachchi and Svensson, {C. E.} and S. Triambak and Wang, {Z. M.} and Williams, {S. J.} and Wood, {J. L.} and J. Wong and Yates, {S. W.} and Zganjar, {E. F.}",

note = "Publisher Copyright: {\textcopyright} The Authors, published by EDP Sciences.; 2015 Heavy Ion Accelerator Symposium, HIAS 2015 ; Conference date: 14-09-2015 Through 18-09-2015",

year = "2016",

month = sep,

day = "5",

doi = "10.1051/epjconf/201612302005",

language = "English",

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Garrett, PE, Jigmeddorj, B, Radich, AJ, Andreoiu, C, Ball, GC, Bangay, JC, Bianco, L, Bildstein, V, Chagnon-Lessard, S, Cross, DS, Demand, GA, Varela, AD, Dunlop, R, Finlay, P, Garnsworthy, AB, Green, KL, Hackman, G, Hadinia, B, Leach, KG, Michetti-Wilson, J, Orce, JN, Rajabali, MM, Rand, ET, Starosta, K, Sumithrarachchi, C, Svensson, CE, Triambak, S, Wang, ZM, Williams, SJ, Wood, JL, Wong, J, Yates, SW & Zganjar, EF 2016, 'Conversion electrons from high-statistics β-decay measurements with the 8π spectrometer at TRIUMF-ISAC', EPJ Web of Conferences, vol. 123, 02005. https://doi.org/10.1051/epjconf/201612302005

TY - JOUR

T1 - Conversion electrons from high-statistics β-decay measurements with the 8π spectrometer at TRIUMF-ISAC

AU - Garrett, P. E.

AU - Jigmeddorj, B.

AU - Radich, A. J.

AU - Andreoiu, C.

AU - Ball, G. C.

AU - Bangay, J. C.

AU - Bianco, L.

AU - Bildstein, V.

AU - Chagnon-Lessard, S.

AU - Cross, D. S.

AU - Demand, G. A.

AU - Varela, A. Diaz

AU - Dunlop, R.

AU - Finlay, P.

AU - Garnsworthy, A. B.

AU - Green, K. L.

AU - Hackman, G.

AU - Hadinia, B.

AU - Leach, K. G.

AU - Michetti-Wilson, J.

AU - Orce, J. N.

AU - Rajabali, M. M.

AU - Rand, E. T.

AU - Starosta, K.

AU - Sumithrarachchi, C.

AU - Svensson, C. E.

AU - Triambak, S.

AU - Wang, Z. M.

AU - Williams, S. J.

AU - Wood, J. L.

AU - Wong, J.

AU - Yates, S. W.

AU - Zganjar, E. F.

PY - 2016/9/5

Y1 - 2016/9/5

N2 - The 8π spectrometer, located at TRIUMF-ISAC, was the world's most powerful spectrometer dedicated to β-decay studies until its decommissioning in early 2014 for replacement with the GRIFFIN array. An integral part of the 8π spectrometer was the Pentagonal Array for Conversion Electron Spectroscopy (PACES) consisting of 5 Si(Li) detectors used for charged-particle detection. PACES enabled both γ - e- and e- - e- coincidence measurements, which were crucial for increasing the sensitivity for discrete e- lines in the presence of large backgrounds. Examples from a 124Cs decay experiment, where the data were vital for the expansion of the 124Csm decay scheme, are shown. With sufficient statistics, measurements of conversion coefficients can be used to extract the E0 components of Jπ → Jπ transitions for J ≠ 0, which is demonstrated for data obtained in 110In→110Cd decay. With knowledge of the shapes of the states involved, as obtained, for example, from the use of Kumar-Cline shape invariants, the mixing of the states can be extracted.

AB - The 8π spectrometer, located at TRIUMF-ISAC, was the world's most powerful spectrometer dedicated to β-decay studies until its decommissioning in early 2014 for replacement with the GRIFFIN array. An integral part of the 8π spectrometer was the Pentagonal Array for Conversion Electron Spectroscopy (PACES) consisting of 5 Si(Li) detectors used for charged-particle detection. PACES enabled both γ - e- and e- - e- coincidence measurements, which were crucial for increasing the sensitivity for discrete e- lines in the presence of large backgrounds. Examples from a 124Cs decay experiment, where the data were vital for the expansion of the 124Csm decay scheme, are shown. With sufficient statistics, measurements of conversion coefficients can be used to extract the E0 components of Jπ → Jπ transitions for J ≠ 0, which is demonstrated for data obtained in 110In→110Cd decay. With knowledge of the shapes of the states involved, as obtained, for example, from the use of Kumar-Cline shape invariants, the mixing of the states can be extracted.

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UR - http://www.scopus.com/inward/citedby.url?scp=85012926319&partnerID=8YFLogxK

U2 - 10.1051/epjconf/201612302005

DO - 10.1051/epjconf/201612302005

M3 - Conference article

AN - SCOPUS:85012926319

SN - 2101-6275

VL - 123

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 02005

T2 - 2015 Heavy Ion Accelerator Symposium, HIAS 2015

Y2 - 14 September 2015 through 18 September 2015

ER -

Conversion electrons from high-statistics β-decay measurements with the 8π spectrometer at TRIUMF-ISAC

Abstract

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