Publications (23)
Characterization and performance of the DTAS detector
V. Guadilla, J. L. Tain, A. Algora +42
DTAS is a segmented total absorption γ-ray spectrometer developed for the DESPEC experiment at FAIR. It is composed of up to eighteen NaI(Tl) crystals. In this work we study the p…
Total Absorption Gamma-Ray Spectroscopy of 87Br, 88Br and 94Rb Beta-Delayed Neutron Emitters
E. Valencia, J. L. Tain, A. Algora +35
We investigate the decay of 87Br, 88Br and 94Rb using total absorption gamma-ray spectroscopy. These important fission products are beta-delayed neutron emitters. Our data show con…
Study of Decay Shape Factors in First-Forbidden Transitions with for Reactor Antineutrino Spectra Predictions
G. A. Alcalá, A. Algora, M. Estienne +36
The electron spectra of the decays of Rb and Cs, key contributors to the reactor antineutrino spectrum, were measured at the IGISOL facility using radioactive b…
Study of the -decay of Tc with Total Absorption -Ray Spectroscopy
V. Guadilla, A. Algora, J. L. Tain +42
The \b{eta}-decay of 100 Tc has been studied using the Total Absorption γ-Ray Spectroscopy technique at IGISOL. In this work the new DTAS spectrometer in coincidence with a cylind…
Characterization of a cylindrical plastic β-detector with Monte Carlo simulations of optical photons
V. Guadilla, A. Algora, J. L. Tain +39
In this work we report on the Monte Carlo study performed to understand and reproduce experimental measurements of a new plastic \b{eta}-detector with cylindrical geometry. Since e…
Nuclear charge radius of Al and its implication for V in the quark-mixing matrix
P. Plattner, E. Wood, L. Al Ayoubi +50
Collinear laser spectroscopy was performed on the isomer of the aluminium isotope Al. The measured isotope shift to Al in the $3s^{2}3p\;^{2}\!P^\circ_{3/2} \rightar…
The MORA project
P. Delahaye, E. Liénard, I. Moore +25
The MORA (Matter's Origin from the RadioActivity of trapped and oriented ions) project aims at measuring with unprecedented precision the D correlation in the nuclear beta decay of…
Discovery of an Exceptionally Strong -Decay Transition of F and Implications for the Fate of Intermediate-Mass Stars
O. S. Kirsebom, S. Jones, D. F. Strömberg +21
A significant fraction of stars between 7-11 solar masses are thought to become supernovae, but the explosion mechanism is unclear. The answer depends critically on the rate of ele…
Total Absorption Spectroscopy Study of the Beta Decay of Br and Rb
S. Rice, A. Algora, J. L. Tain +36
The beta decays of Br and Rb have been studied using the total absorption spectroscopy technique. The radioactive nuclei were produced at the IGISOL facility in Jyvä…
Q-value of the superallowed beta decay of Ga-62
T. Eronen, V. Elomaa, U. Hager +16
Masses of the radioactive isotopes 62Ga, 62Zn and 62Cu have been measured at the JYFLTRAP facility with a relative precision of better than 18 ppb. A Q_EC value of (9181.07 +- 0.54…
Enhanced Gamma-Ray Emission from Neutron Unbound States Populated in Beta Decay
J. L. Tain, E. Valencia, A. Algora +35
Total absorption spectroscopy was used to investigate the beta-decay intensity to states above the neutron separation energy followed by gamma-ray emission in 87,88Br and 94Rb. Acc…
An Ion Guide for the Production of a Low Energy Ion Beam of Daughter Products of -Emitters
B. Tordoff, T. Eronen, V. V. Elomaa +11
A new ion guide has been modeled and tested for the production of a low energy ( 40 kV) ion beam of daughter products of alpha-emitting isotopes. The guide is designed to…
Total Absorption Spectroscopy Study of Rb Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape
A. -A. Zakari-Issoufou, M. Fallot, A. Porta +44
The antineutrino spectra measured in recent experiments at reactors are inconsistent with calculations based on the conversion of integral beta spectra recorded at the ILL reactor.…
Study of beta spectrum shapes relevant to the prediction of reactor antineutrino spectra
G. A. Alcalá, A. Algora, M. Estienne +35
The shapes of the beta spectra of 92Rb and 142Cs, two of the beta decays most relevant for the prediction of the antineutrino spectrum in reactors, have been measured. A new setup…
Total absorption -ray spectroscopy of the decays of Y
V. Guadilla, L. Le Meur, M. Fallot +42
The decays of the ground state (gs) and isomeric state (m) of Y have been studied with the total absorption -ray spectroscopy technique at the Ion Guide Isotope Sep…
Q-values of the Superallowed beta-Emitters 26m-Al, 42-Sc and 46-V and their impact on V_ud and the Unitarity of the CKM Matrix
T. Eronen, J. C. Hardy, V. Elomaa +12
The beta-decay Q_EC-values of the superallowed beta emitters 26m-Al, 42-Sc and 46-V have been measured with a Penning trap to a relative precision of better than 8x10^-9. Our resul…
Total absorption -ray spectroscopy of niobium isomers
V. Guadilla, A. Algora, J. L. Tain +42
The intensity distributions of the decays of Nb and Nb have been determined using the Total Absorption -Ray Spect…
Efficient, high-resolution resonance laser ionization spectroscopy using weak transitions to long-lived excited states
R. P. de Groote, M. Verlinde, V. Sonnenschein +3
Laser spectroscopic studies on minute samples of exotic radioactive nuclei require very efficient experimental techniques. In addition, high resolving powers are required to allow…
Precision measurement of the magnetic octupole moment in Sc as a test for state-of-the-art atomic- and nuclear-structure theory
R. P. de Groote, J. Moreno, J. Dobaczewski +4
We report on measurements of the hyperfine and -constants of the and atomic states in Sc. High-precision atomic calculation…
Beta-decay branching ratios of 62Ga
A. Bey, B. Blank, G. Canchel +20
Beta-decay branching ratios of 62Ga have been measured at the IGISOL facility of the Accelerator Laboratory of the University of Jyvaskyla. 62Ga is one of the heavier Tz = 0, 0+ ->…
First determination of -delayed multiple neutron emission beyond A = 100 through direct neutron measurement: The P value of Sb
R. Caballero-Folch, I. Dillmann, J. Agramunt +34
Background: -delayed multiple neutron emission has been observed for some nuclei with A100, with Rb being the heaviest 2n emitter measured to date. So far, on…
An alternative approach to populate and study the Th nuclear clock isomer
M. Verlinde, S. Kraemer, J. Moens +24
A new approach to observe the radiative decay of the Th nuclear isomer, and to determine its energy and radiative lifetime, is presented. Situated at a uniquely low excitat…
Measurement of the ground-state transition in the decay of F
O. S. Kirsebom, M. Hukkanen, A. Kankainen +36
We report the first detection of the second-forbidden, non-unique, , ground-state transition in the decay of F. A low-energy, mass-separated $^{20}\…