G5 Doctoral dissertation (article)
Probing neutron deficient trans-lead nuclei with γ-ray spectroscopy using in-flight separator and recoil-decay tagging method (2024)
Raskaiden neutronivajaiden ytimien tutkimus gammaspektroskopiaa, rekyyliseparaattoria ja rekyyli-hajoamis-merkitsemistä hyödyntäen

Louko, J. (2024). Probing neutron deficient trans-lead nuclei with γ-ray spectroscopy using in-flight separator and recoil-decay tagging method [Doctoral dissertation]. University of Jyväskylä. JYU Dissertations, 852. https://urn.fi/URN:ISBN:978-952-86-0403-7

JYU authors or editors

Louko, Jussi

Publication details

All authors or editors: Louko, Jussi

eISBN: 978-952-86-0403-7

Journal or series: JYU Dissertations

eISSN: 2489-9003

Publication year: 2024

Number in series: 852

Number of pages in the book: 1 verkkoaineisto (112, 11 sivua)

Publisher: University of Jyväskylä

Publication country: Finland

Publication language: English

Persistent website address: https://urn.fi/URN:ISBN:978-952-86-0403-7

Publication open access: Openly available

Publication channel open access: Open Access channel

Abstract

This thesis describes the experimental setup, techniques, and analysis methods employed in the experiment probing neutron-deficient trans-lead nuclei 213Ac, 211Ac, and 211Ra. Particular attention is given to certain aspects of the used correlation techniques. The nuclei were produced using 180Hf( 37Cl, 4n)213Ac, 175Lu( 40Ar, 4n)211Ac, and 175Lu( 40Ar, 1p3n)211Ra fusion-evaporation reactions. The reaction products were separated using in-flight separator MARA and identified at its focal plane using the recoil-decay-tagging method. Extended level schemes were established for these nuclei. Level-energies of the low-lying yrast states in the 213Ac and 211Ac follow the analogue states in 212Ra and 210Ra, respectively.
This thesis also discusses the differences and advantages between the MARA and RITU separators, especially from the perspective of the heavy element studies. Upgrades to the RITU’s focal plane setup are also presented. The thesis also introduces the newly developed and built automatic liquid nitrogen system made for cooling germanium detectors down to cryogenic temperatures.

Keywords: nuclear physics; spectroscopy; nitrogen; radium; doctoral dissertations

Free keywords: MARA; RITU; JUROGAM 3; liquid nitrogen; actinium; 211Ac; 212Ac; 213Ac; 211Ra

Fields of science:

114 Physical sciences (Natural sciences)

Contributing organizations

JYU units:

Department of Physics

Ministry reporting: Yes

VIRTA submission year: 2024