Element 115

Ulrika Forsberg

Element 115

Ulrika Forsberg

Research output: Thesis › Doctoral Thesis (compilation)

815 Downloads (Pure)

Abstract

This thesis is devoted to detailed studies of element 115 decay chains using the highly efficient multi-coincidence alpha, electron, gamma and X-ray detector setup TASISpec at the gas-filled separator TASCA at GSI, Darmstadt, Germany. In a three-week long experiment thirty new decay chains assumed to stem from element 115 isotopes were observed together with the very first detections of gamma rays and potential X-rays from these nuclei.

Paper I describes preparations in terms of optimisations of the magnetic fields in TASCA. Paper II presents data from 23 of the observed chains and the very first level schemes along element 115 decay chains, and discusses the first observation of potential X-rays. In Paper III aspects of the data analysis are described. Paper IV considers correlations along element 115 decay chains and a generalisation of a previously devised test for congruence of data sets. Paper V presents the remaining seven chains from our experiment and discusses possible isotopic origins of those chains as well as similar chains observed at the Joint Institute for Nuclear Reactions, Dubna, Russia and Lawrence Berkeley National Laboratory, Berkeley, USA. Paper VI is a popular science article about new chemical elements.

Original language	English
Qualification	Doctor
Awarding Institution	Lund University
Supervisors/Advisors	Rudolph, Dirk, Supervisor Golubev, Pavel, Supervisor
Award date	2016 May 20
Place of Publication	Lund
Publisher	Lund University, Faculty of Science, Division of Nuclear Physics
ISBN (Print)	978-91-7623-812-7
ISBN (electronic)	978-91-7623-813-4
Publication status	Published - 2016

Bibliographical note

Defence details
Date: [2016-05-20]
Time: [13:15]
Place: [Physicum, Rydberg Lecture Hall, Sölvegatan 14A, Lund]
External reviewer(s)
Name: [Lopez-Martens, Araceli]
Title: [Dr.]
Affiliation: [CSNSM and Université Paris-Sud, Campus d’Orsay, Orsay, France]

Subject classification (UKÄ)

Natural Sciences
Subatomic Physics

Free keywords

superheavy elements
element 115
new elements
alpha decay
X rays
gamma rays
nuclear structure
spontaneous fission
Fysicumarkivet A:2016:Forsberg

Access to Document

thesisFinal published version, 7.41 MB

1 Article
1 Review article

Results and plans for nuclear spectroscopy of superheavy nuclei: the Lund perspective
Rudolph, D., 2022 Dec 12, In: European Physical Journal A. 58, 12, 19 p., 242.
Research output: Contribution to journal › Review article › peer-review

Open Access
Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains
Rudolph, D., Forsberg, U., Golubev, P., Sarmiento, L., Yakushev, A., Andersson, L.-L., Di Nitto, A., Düllmann, C. E., Gates, J. M., Gregorich, K. E., Gross, C. J., Herzberg, R.-D., Heßberger, F. P., Khuyagbaatar, J., Kratz, J. V., Rykaczewski, K., Schädel, M., Åberg, S., Ackermann, D. & Block, M. & 31 others, Brand, H., Carlsson, G., Cox, D., Derkx, X., Eberhardt, K., Even, J., Fahlander, C., Gerl, J., Jäger, E., Kindler, B., Krier, J., Kojouharov, I., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Nitsche, H., Omtvedt, J. P., Papadakis, P., Ragnarsson, I., Runke, J., Schaffner, H., Schausten, B., Thörle-Pospiech, P., Torres, T., Traut, T., Trautmann, N., Türler, A., Ward, A., Ward, D. & Wiehl, N., 2014, In: Acta Physica Polonica. Series B: Elementary Particle Physics, Nuclear Physics, Statistical Physics, Theory of Relativity, Field Theory. 45, p. 263-272 10 p.
Research output: Contribution to journal › Article › peer-review

Open Access
File
348 Downloads (Pure)

1 Finished

Element 115
Forsberg, U. (Research student), Rudolph, D. (Supervisor), Golubev, P. (Assistant supervisor) & Fahlander, C. (Assistant supervisor)
The Royal Physiographic Society in Lund
2011/01/01 → 2016/05/31
Project: Dissertation

Cite this

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title = "Element 115",

abstract = "This thesis is devoted to detailed studies of element 115 decay chains using the highly efficient multi-coincidence alpha, electron, gamma and X-ray detector setup TASISpec at the gas-filled separator TASCA at GSI, Darmstadt, Germany. In a three-week long experiment thirty new decay chains assumed to stem from element 115 isotopes were observed together with the very first detections of gamma rays and potential X-rays from these nuclei. Paper I describes preparations in terms of optimisations of the magnetic fields in TASCA. Paper II presents data from 23 of the observed chains and the very first level schemes along element 115 decay chains, and discusses the first observation of potential X-rays. In Paper III aspects of the data analysis are described. Paper IV considers correlations along element 115 decay chains and a generalisation of a previously devised test for congruence of data sets. Paper V presents the remaining seven chains from our experiment and discusses possible isotopic origins of those chains as well as similar chains observed at the Joint Institute for Nuclear Reactions, Dubna, Russia and Lawrence Berkeley National Laboratory, Berkeley, USA. Paper VI is a popular science article about new chemical elements. ",

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author = "Ulrika Forsberg",

note = "Defence details Date: [2016-05-20] Time: [13:15] Place: [Physicum, Rydberg Lecture Hall, S{\"o}lvegatan 14A, Lund] External reviewer(s) Name: [Lopez-Martens, Araceli] Title: [Dr.] Affiliation: [CSNSM and Universit{\'e} Paris-Sud, Campus d{\textquoteright}Orsay, Orsay, France] ",

year = "2016",

language = "English",

isbn = "978-91-7623-812-7",

publisher = "Lund University, Faculty of Science, Division of Nuclear Physics",

type = "Doctoral Thesis (compilation)",

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N1 - Defence details Date: [2016-05-20] Time: [13:15] Place: [Physicum, Rydberg Lecture Hall, Sölvegatan 14A, Lund] External reviewer(s) Name: [Lopez-Martens, Araceli] Title: [Dr.] Affiliation: [CSNSM and Université Paris-Sud, Campus d’Orsay, Orsay, France]

PY - 2016

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N2 - This thesis is devoted to detailed studies of element 115 decay chains using the highly efficient multi-coincidence alpha, electron, gamma and X-ray detector setup TASISpec at the gas-filled separator TASCA at GSI, Darmstadt, Germany. In a three-week long experiment thirty new decay chains assumed to stem from element 115 isotopes were observed together with the very first detections of gamma rays and potential X-rays from these nuclei. Paper I describes preparations in terms of optimisations of the magnetic fields in TASCA. Paper II presents data from 23 of the observed chains and the very first level schemes along element 115 decay chains, and discusses the first observation of potential X-rays. In Paper III aspects of the data analysis are described. Paper IV considers correlations along element 115 decay chains and a generalisation of a previously devised test for congruence of data sets. Paper V presents the remaining seven chains from our experiment and discusses possible isotopic origins of those chains as well as similar chains observed at the Joint Institute for Nuclear Reactions, Dubna, Russia and Lawrence Berkeley National Laboratory, Berkeley, USA. Paper VI is a popular science article about new chemical elements.

AB - This thesis is devoted to detailed studies of element 115 decay chains using the highly efficient multi-coincidence alpha, electron, gamma and X-ray detector setup TASISpec at the gas-filled separator TASCA at GSI, Darmstadt, Germany. In a three-week long experiment thirty new decay chains assumed to stem from element 115 isotopes were observed together with the very first detections of gamma rays and potential X-rays from these nuclei. Paper I describes preparations in terms of optimisations of the magnetic fields in TASCA. Paper II presents data from 23 of the observed chains and the very first level schemes along element 115 decay chains, and discusses the first observation of potential X-rays. In Paper III aspects of the data analysis are described. Paper IV considers correlations along element 115 decay chains and a generalisation of a previously devised test for congruence of data sets. Paper V presents the remaining seven chains from our experiment and discusses possible isotopic origins of those chains as well as similar chains observed at the Joint Institute for Nuclear Reactions, Dubna, Russia and Lawrence Berkeley National Laboratory, Berkeley, USA. Paper VI is a popular science article about new chemical elements.

KW - superheavy elements

KW - element 115

KW - new elements

KW - alpha decay

KW - X rays

KW - gamma rays

KW - nuclear structure

KW - spontaneous fission

KW - Fysicumarkivet A:2016:Forsberg

KW - kärnstruktur

KW - supertunga grundämnen

KW - nya grundämnen

KW - alfasönderfall

KW - röntgenstrålning

KW - gammastrålning

KW - spontan fission

KW - element 115

KW - spektroskopi

M3 - Doctoral Thesis (compilation)

SN - 978-91-7623-812-7

PB - Lund University, Faculty of Science, Division of Nuclear Physics

CY - Lund

ER -

Element 115

Abstract

Bibliographical note

Subject classification (UKÄ)

Free keywords

Access to Document

Fingerprint

Research output

Results and plans for nuclear spectroscopy of superheavy nuclei: the Lund perspective

Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains

Projects

Element 115

Cite this