Nuclear structure with beta-decay (II)

21 September-2 October

Probing nuclear structure with beta-decay energy spectra, present and near future state (II)

Organizers: X. Mougeot (CEA-LIST, LNHB, contact), B. C. Rasco (ORNL)
Talks and seminars during the first week (21/09-25/09); working group: 28 Sept.-2 Oct.

PROGRAM: ProjectBetaDecayESNTv18Sept2026.pdf SCHEDULE: ProgramBetaDecayESNTv18Sept2026.pdf

The first workshop (ESNT, July 6-10, 2025) was successful in starting conversations between theoretical and experimental physicists, as well as between experimentalists studying beta-decays from different energy regimes (low energy up to ~700 keV versus higher energy up to several MeV).

The goals of this workshop are to:

1.   Continue encouragement for experimental and theoretical beta-decay experts to discuss and exchange approaches on different models, limits, and possible improvements thereof.
2.   Decide on common actions such as comparing analysis approaches of the same experimental dataset, and comparing theoretical predictions on parts of the nuclear structure models.
3.   List priority nuclei and transitions for common studies, focusing on those with possible high impact on related fields. There were some conclusions on this from the first meeting.
4.   Ultimately, to agree within the community on a robust procedure to improve nuclear structure models with experimental information from beta-decay energy spectra.
5.   Continue discussions of beta-decay standards.

This workshop is anticipated as the second of several workshops.

Short-term visitor: B.C. Rasco, Oak Ridge National Laboratory, Individual beta Spectra in Complex beta-Decay.

LIST OF TALKS

Theory & Experiment

O. Naviliat-Cuncic (MSU) - Vud once more
E. Nseir (IJCLab) - The essential Doorway Decay of 83Ga investigated with PARIS
B.C. Rasco (ORNL) - Bremsstrahlung impact on beta decay

Experiment
+ B. Sabot (CEA DRT) - Influence of beta spectrum on new primary activity standards

TalkESNT21Sept26_BSabot.pdf

+ X. Fléchard (LPC Caen) - Benchmarking of Geant4 for calorimetry measurements

+ M. Brodeur (University of Notre Dame) - Beta decay recoil time-of-flight measurements with St. Benedict

TalkESNT21Sept26_MBrodeur.pdf

+ M. Rodrigues (CEA DRT) - Beta spectrum of I-129 using metallic microcalorimeters

+ M. Stukel (SNOLAB) - RAMPS: Measurement of the highly forbidden decay of Lu-176

+ M. Atzori Corona (INFN) - GAIAS: Precision Measurements of Forbidden Non-Unique Beta Spectra for the Investigation of the Axial-Vector Coupling Constant

TalkESNT22Sept26_MAtzoriCorona.pdf

+ C. Doutre (CEA DRF DPhN) - First experimental study of the start point of 28Al Beta-decay with the CRAB facility

TalkESNT24Sept26_CDoutre.pdf

+ K. Han (Shanghai Jiao Tong University) - Beta and double-beta decays with liquid xenon detectors SEMINAR

+ P. Di Stefano (Queen's University) - The KDK Experiment: Investigating 40K

TalkESNT23Sept26A2_PDiStefano.pdf TalkESNT23Sept26B2_PDiStefano.pdf

+ N. Cullen (Queen's University) - The XDK (X-ray Decay) experiment: Upgrading KDK for General EC Measurements

TalkESNT23Sept26_NCullen.pdf

+ C. Knapen (KU Leuven) - Experimental set-up for high precision beta spectrum shape measurements at WISArD

+ A. Lépine (CENBG) - SPELS – Beta shape of 32P at WISArD

TalkESNT24Sept26_ALepine.pdf

+ S. Leblond (CEA DRT) - Beta spectrometry at LNHB

+ G. Craveiro (KU Leuven) - Study of 90Sr/Y beta spectrum

Theory

+ X. Mougeot (CEA DRT) - Beta decay from the nuclear data perspective

TalkESNT21Sept26_XMougeot.pdf

+ L. Hayen (LPC Caen) - What can recoil spectroscopy teach us in looking for BSM?

+ J. Suhonen (University of Jyväskylä) - The many facets of beta spectral shapes

TalkESNT22Sept26_JSuhonen.pdf

+ M. Hellgren (CEA DES) - pnQFAM implementation for allowed beta-decay transitions using a Gogny interaction

TalkESNT22Sept26_MHellgren.pdf

+ P. Navratil (TRIUMF) - Ab initio calculations of beta decays in light nuclei

+ A. Andoche (CEA DRT) - Electronic structure and its effect on beta decay

TalkESNT25Sept26_AAndoche.pdf

+ C. Jeudy (University of Strasbourg) - Influence of the environment on nuclear decays

SCHEDULE

	Monday 21 Sept.	Tuesday 22 Sept.	Wednesday 23 Sept.	Thursday 24 Sept.	Friday 25 Sept.
8h45	Welcome	Discussions	Discussions	Discussions	Discussions
9h	O. Naviliat-Cuncic	J. Suhonen	B.C. Rasco	C. Doutre	S. Leblond
9h45	B. Sabot	M. Hellgren	P. Navratil	M. Stukel	G. Craveiro
10h30	Break	Break	Break	Break	Break
11h	X. Fléchard	M. Rodrigues	P. Di Stefano	Seminar K. Han	A. Andoche
11h45	X. Mougeot	M. Atzori Corona	N. Cullen	Seminar K. Han	C. Jeudy
12h30	Lunch	Lunch	Lunch	Lunch	Lunch
14h15	L. Hayen	E. Nseir	DWG	C. Knapen	DWG
15h	M. Brodeur	DWG	*end*	A. Lépine	*Closing*
15h45	Break	Break	Coffee Break	Break	Coffee Break
16h15	DWG	DWG		DWG
17h	End	End		End