Recoil distance method lifetime measurements at TRIUMF-ISAC using the TIGRESS Integrated Plunger

A. Chester; G. C. Ball; N. Bernier; D. S. Cross; T. Domingo; T. E. Drake; L. J. Evitts; F. H. Garcia; A. B. Garnsworthy; G. Hackman; S. Hallam; J. Henderson; R. Henderson; R. Krücken; E. MacConnachie; M. Moukaddam; E. Padilla-Rodal; O. Paetkau; J. L. Pore; U. Rizwan; P. Ruotsalainen; J. Shoults; J. Smallcombe; J. K. Smith; K. Starosta; C. E. Svensson; K. Van Wieren; J. Williams; M. Williams

doi:10.1016/j.nima.2017.11.029

Recoil distance method lifetime measurements at TRIUMF-ISAC using the TIGRESS Integrated Plunger

A. Chester^*, G. C. Ball, N. Bernier, D. S. Cross, T. Domingo, T. E. Drake, L. J. Evitts, F. H. Garcia, A. B. Garnsworthy, G. Hackman, S. Hallam, J. Henderson, R. Henderson, R. Krücken, E. MacConnachie, M. Moukaddam, E. Padilla-Rodal, O. Paetkau, J. L. Pore, U. RizwanP. Ruotsalainen, J. Shoults, J. Smallcombe, J. K. Smith, K. Starosta, C. E. Svensson, K. Van Wieren, J. Williams, M. Williams

^*Corresponding author for this work

Physics and Astronomy

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

7 Scopus citations

Abstract

The TIGRESS Integrated Plunger device (TIP) has been developed for recoil distance method (RDM) lifetime measurements using the TIGRESS array of HPGe γ-ray detectors at TRIUMF's ISAC-II facility. A commissioning experiment was conducted utilizing a 250 MeV ⁸⁴Kr beam at ≈2×10⁸ particles per second. The ⁸⁴Kr beam was Coulomb excited to the 2₁⁺ state on a movable ²⁷Al target. A thin Cu foil fixed downstream from the target was used as a degrader. Excited nuclei emerged from the target and decayed by γ-ray emission at a distance determined by their velocity and the lifetime of the 2₁⁺ state. The ratio of decays which occur between the target and degrader to those occurring after traversing the degrader changes as a function of the target–degrader separation distance. Gamma-ray spectra at 13 target–degrader separation distances were measured and compared to simulated lineshapes to extract the lifetime. The result of τ=5.541±0.013(stat.)±0.063(sys.) ps is shorter than the literature value of 5.84±0.18 ps with a reduction in uncertainty by a factor of approximately two. The TIP plunger device, experimental technique, analysis tools, and result are discussed.

Original language	English (US)
Pages (from-to)	69-83
Number of pages	15
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	882
DOIs	https://doi.org/10.1016/j.nima.2017.11.029
State	Published - Feb 21 2018

Funding

The authors would like to acknowledge the support of the ISAC Operations Group and Detector Group at TRIUMF , and the Simon Fraser University Electronics and Machine Shops . The Coulex angular correlation work benefited from many discussions with Dr. Ching-Yen Wu; the authors are grateful for his input and advice. This work was supported by the Natural Sciences and Engineering Research Council of Canada award SAPIN/371656-2015 . This work has been supported by the Natural Sciences and Engineering Research Council of Canada , The Canada Foundation for Innovation , and the British Columbia Knowledge Development Fund . TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada.

Keywords

Coulomb excitation
CsI(Tl) pulse shape analysis
Doppler-shift lifetime methods
Gamma-ray spectroscopy
Monte Carlo analysis

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/j.nima.2017.11.029

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Chester, A., Ball, G. C., Bernier, N., Cross, D. S., Domingo, T., Drake, T. E., Evitts, L. J., Garcia, F. H., Garnsworthy, A. B., Hackman, G., Hallam, S., Henderson, J., Henderson, R., Krücken, R., MacConnachie, E., Moukaddam, M., Padilla-Rodal, E., Paetkau, O., Pore, J. L., ... Williams, M. (2018). Recoil distance method lifetime measurements at TRIUMF-ISAC using the TIGRESS Integrated Plunger. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 882, 69-83. https://doi.org/10.1016/j.nima.2017.11.029

@article{ea8cf9f54a6345ef871a5d41d5b173df,

title = "Recoil distance method lifetime measurements at TRIUMF-ISAC using the TIGRESS Integrated Plunger",

abstract = "The TIGRESS Integrated Plunger device (TIP) has been developed for recoil distance method (RDM) lifetime measurements using the TIGRESS array of HPGe γ-ray detectors at TRIUMF's ISAC-II facility. A commissioning experiment was conducted utilizing a 250 MeV 84Kr beam at ≈2×108 particles per second. The 84Kr beam was Coulomb excited to the 21+ state on a movable 27Al target. A thin Cu foil fixed downstream from the target was used as a degrader. Excited nuclei emerged from the target and decayed by γ-ray emission at a distance determined by their velocity and the lifetime of the 21+ state. The ratio of decays which occur between the target and degrader to those occurring after traversing the degrader changes as a function of the target–degrader separation distance. Gamma-ray spectra at 13 target–degrader separation distances were measured and compared to simulated lineshapes to extract the lifetime. The result of τ=5.541±0.013(stat.)±0.063(sys.) ps is shorter than the literature value of 5.84±0.18 ps with a reduction in uncertainty by a factor of approximately two. The TIP plunger device, experimental technique, analysis tools, and result are discussed.",

keywords = "Coulomb excitation, CsI(Tl) pulse shape analysis, Doppler-shift lifetime methods, Gamma-ray spectroscopy, Monte Carlo analysis",

author = "A. Chester and Ball, \{G. C.\} and N. Bernier and Cross, \{D. S.\} and T. Domingo and Drake, \{T. E.\} and Evitts, \{L. J.\} and Garcia, \{F. H.\} and Garnsworthy, \{A. B.\} and G. Hackman and S. Hallam and J. Henderson and R. Henderson and R. Kr{\"u}cken and E. MacConnachie and M. Moukaddam and E. Padilla-Rodal and O. Paetkau and Pore, \{J. L.\} and U. Rizwan and P. Ruotsalainen and J. Shoults and J. Smallcombe and Smith, \{J. K.\} and K. Starosta and Svensson, \{C. E.\} and \{Van Wieren\}, K. and J. Williams and M. Williams",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2018",

month = feb,

day = "21",

doi = "10.1016/j.nima.2017.11.029",

language = "English (US)",

volume = "882",

pages = "69--83",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier B.V.",

}

Chester, A, Ball, GC, Bernier, N, Cross, DS, Domingo, T, Drake, TE, Evitts, LJ, Garcia, FH, Garnsworthy, AB, Hackman, G, Hallam, S, Henderson, J, Henderson, R, Krücken, R, MacConnachie, E, Moukaddam, M, Padilla-Rodal, E, Paetkau, O, Pore, JL, Rizwan, U, Ruotsalainen, P, Shoults, J, Smallcombe, J, Smith, JK, Starosta, K, Svensson, CE, Van Wieren, K, Williams, J & Williams, M 2018, 'Recoil distance method lifetime measurements at TRIUMF-ISAC using the TIGRESS Integrated Plunger', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 882, pp. 69-83. https://doi.org/10.1016/j.nima.2017.11.029

Recoil distance method lifetime measurements at TRIUMF-ISAC using the TIGRESS Integrated Plunger. / Chester, A.; Ball, G. C.; Bernier, N. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 882, 21.02.2018, p. 69-83.

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

TY - JOUR

T1 - Recoil distance method lifetime measurements at TRIUMF-ISAC using the TIGRESS Integrated Plunger

AU - Chester, A.

AU - Ball, G. C.

AU - Bernier, N.

AU - Cross, D. S.

AU - Domingo, T.

AU - Drake, T. E.

AU - Evitts, L. J.

AU - Garcia, F. H.

AU - Garnsworthy, A. B.

AU - Hackman, G.

AU - Hallam, S.

AU - Henderson, J.

AU - Henderson, R.

AU - Krücken, R.

AU - MacConnachie, E.

AU - Moukaddam, M.

AU - Padilla-Rodal, E.

AU - Paetkau, O.

AU - Pore, J. L.

AU - Rizwan, U.

AU - Ruotsalainen, P.

AU - Shoults, J.

AU - Smallcombe, J.

AU - Smith, J. K.

AU - Starosta, K.

AU - Svensson, C. E.

AU - Van Wieren, K.

AU - Williams, J.

AU - Williams, M.

PY - 2018/2/21

Y1 - 2018/2/21

N2 - The TIGRESS Integrated Plunger device (TIP) has been developed for recoil distance method (RDM) lifetime measurements using the TIGRESS array of HPGe γ-ray detectors at TRIUMF's ISAC-II facility. A commissioning experiment was conducted utilizing a 250 MeV 84Kr beam at ≈2×108 particles per second. The 84Kr beam was Coulomb excited to the 21+ state on a movable 27Al target. A thin Cu foil fixed downstream from the target was used as a degrader. Excited nuclei emerged from the target and decayed by γ-ray emission at a distance determined by their velocity and the lifetime of the 21+ state. The ratio of decays which occur between the target and degrader to those occurring after traversing the degrader changes as a function of the target–degrader separation distance. Gamma-ray spectra at 13 target–degrader separation distances were measured and compared to simulated lineshapes to extract the lifetime. The result of τ=5.541±0.013(stat.)±0.063(sys.) ps is shorter than the literature value of 5.84±0.18 ps with a reduction in uncertainty by a factor of approximately two. The TIP plunger device, experimental technique, analysis tools, and result are discussed.

AB - The TIGRESS Integrated Plunger device (TIP) has been developed for recoil distance method (RDM) lifetime measurements using the TIGRESS array of HPGe γ-ray detectors at TRIUMF's ISAC-II facility. A commissioning experiment was conducted utilizing a 250 MeV 84Kr beam at ≈2×108 particles per second. The 84Kr beam was Coulomb excited to the 21+ state on a movable 27Al target. A thin Cu foil fixed downstream from the target was used as a degrader. Excited nuclei emerged from the target and decayed by γ-ray emission at a distance determined by their velocity and the lifetime of the 21+ state. The ratio of decays which occur between the target and degrader to those occurring after traversing the degrader changes as a function of the target–degrader separation distance. Gamma-ray spectra at 13 target–degrader separation distances were measured and compared to simulated lineshapes to extract the lifetime. The result of τ=5.541±0.013(stat.)±0.063(sys.) ps is shorter than the literature value of 5.84±0.18 ps with a reduction in uncertainty by a factor of approximately two. The TIP plunger device, experimental technique, analysis tools, and result are discussed.

KW - Coulomb excitation

KW - CsI(Tl) pulse shape analysis

KW - Doppler-shift lifetime methods

KW - Gamma-ray spectroscopy

KW - Monte Carlo analysis

UR - http://www.scopus.com/inward/record.url?scp=85034743161&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85034743161&partnerID=8YFLogxK

U2 - 10.1016/j.nima.2017.11.029

DO - 10.1016/j.nima.2017.11.029

M3 - Article

AN - SCOPUS:85034743161

SN - 0168-9002

VL - 882

SP - 69

EP - 83

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ER -

Recoil distance method lifetime measurements at TRIUMF-ISAC using the TIGRESS Integrated Plunger

Abstract

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Keywords

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