| Title: |
Decay spectroscopy at the two-proton drip line : Radioactivity of the new nuclides 160Os and 156W |
| Authors: |
Briscoe, A.D.; Page, R.D.; Uusitalo, J.; Joss, D.T.; AlAqeel, M.A.M.; Alayed, B.; Andel, B.; Antalic, S.; Auranen, K.; Ayatollahzadeh, H.; Badran, H.; Barber, L.; Beeton, G.; Birova, M.; Bogdanoff, V.; Clark, R. M.; Cubiss, J. G.; Cullen, D. M.; Deary, J.; Forsberg, U.; Grahn, T.; Greenlees, P. T.; Hilton, J. B.; Illana, A.; Joukainen, H.; Judson, D.S.; Julin, R.; Jutila, H.; Keatings, J. M.; Labiche, M.; Leino, M.; Lewis, M. C.; Louko, J.; Luoma, M.; Martel, I.; McCarter, A.; McKee, P. P.; Mosat, P.; Nathaniel, S. N.; Neuvonen, O.; O'Donnell, D.; Ojala, J.; Page, C. A. A.; Plaza, A. M.; Pakarinen, J.; Papadakis, P.; Parr, E.; Partanen, J.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sarén, J.; Saygi, B.; Smallcombe, J.; Smith, J. F.; Sorri, J.; Sullivan, C. M.; Szwec, S.; Tann, H.; Tolosa-Delgado, A.; Uusikylä, E.; Venhart, M.; Waring, L. J.; Zimba, G. |
| Publisher Information: |
Elsevier |
| Publication Year: |
2023 |
| Collection: |
JYX - Jyväskylä University Digital Archive / Jyväskylän yliopiston julkaisuarkisto |
| Subject Terms: |
Accelerator Laboratory; Kiihdytinlaboratorio; ydinfysiikka |
| Description: |
The radioactivity of 160 76Os84 and 156 74W82 that lie at the two-proton drip line has been measured in an experiment performed at the Accelerator Laboratory of the University of Jyväskylä. The 160Os nuclei were produced using fusion-evaporation reactions induced by a beam of 310 MeV 58Ni ions bombarding a 106Cd target. The 160Os ions were separated in flight using the recoil separator MARA and implanted into a double-sided silicon strip detector, which was used to measure their decays. The 𝛼 decays of the ground state of 160Os (𝐸𝛼 = 7092(15) keV, 𝑡1∕2 = 97+97 −32 μs) and its isomeric state (𝐸𝛼 = 8890(10) keV, 𝑡1∕2 = 41+15 −9 μs) were measured, allowing the excitation energy of the isomer to be determined as 1844(18) keV. These 𝛼-decay properties and the excitation energy of the isomer are compared with systematics. The 𝛼 decays were correlated with subsequent decays to investigate the 𝛽 decays of the ground state of 156W, revealing that unlike its isotones, both low-lying isomers were populated in its daughter nuclide, 156Ta. An improved value for the half-life of the proton-decaying high-spin isomeric state in 156 73Ta83 of 333+25 −22 ms was obtained in a separate experiment using the same experimental systems with a 102Pd target. This result was employed to improve the precision of the half-life determined for 156W, which was measured as 157+57 −34 ms. ; peerReviewed |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf; fulltext |
| Language: |
English |
| ISSN: |
0370-2693 |
| Relation: |
Physics Letters B; 847; 307685; Research Council of Finland; Suomen Akatemia |
| Availability: |
http://urn.fi/URN:NBN:fi:jyu-202401241495 |
| Rights: |
CC BY 4.0 ; © 2023 The Authors. Published by Elsevier B.V. ; openAccess ; https://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.3F63439B |
| Database: |
BASE |