A1 Journal article (refereed)
A charge plunger device to measure the lifetimes of excited nuclear states where transitions are dominated by internal conversion (2020)

Barber, L., Heery, J., Cullen, D.M., Singh, B. N., Herzberg, R.D., Müller-Gatermann, C., Beeton, G., Bowry, M., Dewald, A., Grahn, T., Greenlees, P.T., Illana, A., Julin, R., Juutinen, S., Keatings, J.M., Luoma, M., O’Donnell, D., Ojala, J., Pakarinen, J., . . . Zimba, G. (2020). A charge plunger device to measure the lifetimes of excited nuclear states where transitions are dominated by internal conversion. Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 979, Article 164454. https://doi.org/10.1016/j.nima.2020.164454

JYU authors or editors

Publication details

All authors or editors: Barber, L.; Heery, J.; Cullen, D.M.; Singh, B.S. Nara; Herzberg, R.D.; Müller-Gatermann, C.; Beeton, G.; Bowry, M.; Dewald, A.; Grahn, T.; et al.

Journal or series: Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment

ISSN: 0168-9002

eISSN: 1872-9576

Publication year: 2020

Volume: 979

Article number: 164454

Publisher: Elsevier BV

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.nima.2020.164454

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/71400

Abstract

A charge plunger device has been commissioned based on the DPUNS plunger (Taylor et al., 2013) using the in-flight mass separator MARA at the University of Jyväskylä. The 152Sm(32S,4n)180Pt reaction was used to populate excited states in 180Pt. A lifetime measurement of the 21+ state was performed by applying the charge plunger technique, which relies on the detection of the charge state-distribution of recoils rather than the detection of the emitted γ rays. This state was a good candidate to test the charge plunger technique as it has a known lifetime and depopulates through a converted transition that competes strongly with γ-ray emission. The lifetime of the 21+ state was measured to be 480(10)ps, which is consistent with previously reported lifetimes that relied on the standard γ-ray techniques. The charge plunger technique is a complementary approach to lifetime measurements of excited states that depopulate through both γ-ray emission and internal conversion. In cases where it is not possible to detect Doppler-shifted γ rays, for example, in heavy nuclei where internal conversion dominates, it may well be the only feasible lifetime analysis approach.

Keywords: nuclear physics

Free keywords: charge plunger; plunger; nuclear-state lifetimes; RDDSDDCM

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 1