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95 results on '"Briz, J.A."'

2. An innovative Superconducting Recoil Separator for HIE-ISOLDE

Author

Martel, I., Acosta, L., Aguado, J.L., Assie, M., Al-Aqeel, M.A.M., Ballarino, A., Barna, D., Berjillos, R., Bonora, M., Bontoiu, C., Borge, M.J.G., Briz, J.A., Bustinduy, I., Bottura, L., Catalina-Medina, L., Catford, W., Cederkäll, J., Davinson, T., de Angelis, G., Devred, A., Díaz-Martín, C., Ekelöf, T., Felice, H., Fynbo, H., Foussat, A.P., Florin, R., Freeman, S.J., Gaffney, L., García-Ramos, C., Gentini, L., Gonzalez-Cordero, C.A., Guazzoni, C., Haziot, A., Heinz, A., Jimenez, J.M., Johnston, K., Jonson, B., Kirby, G., Kirby, O., Kurtukian-Nieto, T., Labiche, M., Liebsch, M., Losasso, M., Laird, A., Muñoz, J.L., Nara Singh, B.S., Neyens, G., Napiorkowski, P.J., O'Donnell, D., Page, R.D., Perini, D., Resta-López, J., Riddone, G., Rodriguez, J.A., Rodin, V., Russenschuck, S., Sharma, V.R., Salguero-Andújar, F., Sánchez-Segovia, J., Riisager, K., Sánchez-Benítez, A.M., Shepherd, B., Siesling, E., Smallcombe, J., Stanoiu, M., Tengblad, O., Thermeau, J.P., Tommasini, D., Uusitalo, J., Varnasseri, S., Welsch, C.P., and Willering, G.

Published
2023
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3. Fast-timing Investigation of \(A=128\) Isobars Populated in the \(\beta \)-decay of \(^{128}\)Cd

Author

Llanos-Expósito, M., primary, Fraile, L.M., additional, Benito, J., additional, Acosta, J., additional, Algora, A., additional, Andel, B., additional, Andreyev, A.N., additional, Antalic, S., additional, Bark, R.A., additional, Bernerd, C., additional, Bernier, N., additional, Bhengu, B., additional, Bittner, D., additional, Borge, M.J.G., additional, Briz, J.A., additional, Chrysalidis, K., additional, Cocolios, T.E., additional, Costache, C., additional, Cubiss, J.G., additional, De Witte, H., additional, Encina, N., additional, Esmaylzadeh, A., additional, Favier, Z., additional, Fernández, D., additional, Ferrera, C., additional, Fynbo, H.O.U., additional, García-Távora, V., additional, Georgiev, G., additional, Górska, M., additional, Heinke, R., additional, Herraiz, J.L., additional, Illana, A., additional, Jones, P., additional, Judson, D.S., additional, Jungclaus, A., additional, Karny, M., additional, Korgul, A., additional, Köster, U., additional, Kröll, Th., additional, Labiche, M., additional, Lalkovski, S., additional, Lesch, B., additional, Ley, M., additional, Lică, R., additional, Madurga, M., additional, Mărginean, N., additional, Marsh, B.A., additional, Miernik, K., additional, Mihai, C., additional, Mikolajczuk, M., additional, Mišt, J., additional, Murias, J.R., additional, Nácher, E., additional, Neacsu, C., additional, Nouvilas, V.M., additional, Ntshangase, S., additional, Olaizola, B., additional, Orce, J.N., additional, Page, C., additional, Pakarinen, J., additional, Papadakis, P., additional, Perea, A., additional, Piersa-Siłkowska, M., additional, Podolyak, Zs., additional, Rog, J., additional, Rothe, S., additional, Rozwoda, B., additional, Sánchez-Tembleque, V., additional, Solak, K., additional, Stegemann, S., additional, Stepaniuk, M., additional, Stoica, A., additional, Stryjczyk, M., additional, Tengblad, O., additional, Turturica, A., additional, Turturica, G., additional, Udías, J.M., additional, Ujeniuc, S., additional, Van Duppen, P., additional, von Tresckow, M., additional, Vasilev, I., additional, Warr, N., additional, Yue, Z., additional, and Zajda, S., additional

Published
2024
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4. Commissioning of miniBELEN-10A, a moderated neutron counter with a flat efficiency for thick-target neutron yields measurements

Author

Mont-Geli N., Tarifeño-Saldivia A., Fraile L.M., Viñals S., Perea A., Pallàs M., Cortés G., Garcia G., Nácher E., Tain J.L., Alcayne V., Alonso-Sañudo O., Algora A., Balibrea-Correa J., Benito J., Borge M.J.G., Briz J.A., Calviño F., Cano-Ott D., De Blas A., Domingo-Pardo C., Fernández B., Garcia R., Gómez-Camacho J., González-Romero E.M., Guerrero C., Lerendegui-Marco J., Llanos M., Martínez T., Martínez-Nouvilas V., Mendoza E., Murias J.R., Orrigo S.E.A., Pérez de Rada A., Pesudo V., Plaza J., Quesada J.M., Sánchez A., Sánchez-Tembleque V., Santorelli R., Tengblad O., Udías J.M., and Villamarín D.

Subjects
Physics, QC1-999
Abstract

miniBELEN-10A is a modular and transportable moderated neutron counter with a nearly flat detection efficiency up to 8 MeV. The detector was designed to carry out measurements of (α, n) reactions in the context of the Measurement of Alpha Neutron Yields (MANY) project. In this work we present the results of the commissioning of miniBELEN-10A using the relatively well-known thick-target neutron yields from 27Al(α, n)30P.

Published
2023
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5. Populating α-unbound states in 16O via 19F (p, αy)16O reaction

Author

Távora V.G., Tengblad O., Borge M.J.G., Briz J.A., Fernandez Ruiz D., Jensen E.A.M., Nerio A.N., and Perea A.

Subjects
Physics, QC1-999
Abstract

The 12C(α, y)16O reaction is important in the production of universal 16O, but its cross-section at the relevant energies of static helium burning is complex and uncertain. The total cross-section originates from a sum of resonance tails and direct captures, making the contributions of sub-threshold states difficult to estimate. One proposed method to estimate these contributions involves determining relevant reduced α-widths of the sub-threshold states through indirect measurements. Therefore, 19F(p, αy)16O reaction was used to populate α-unbound states in 16O using a 2.6 MeV proton beam on a CaF2 target. A detection system consisting of single and telescope configurations of Si detectors was used to detect 2α-particles and a 12C particle in coincidence. Scintillator detectors were included in the setup to study the de-excitation of the states populated in 16O to the ground state. Under good event conditions a preliminar indentification of the particles detected has been conducted.

Published
2023
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6. miniBELEN: A modular neutron counter for (𝜶, 𝒏) reactions

Author

Mont-Geli N., Tarifeño-Saldivia A., Fraile L.M., Viñals S., Perea A., Pallàs M., Cortés G., Nácher E., Tain J.L., Alcayne V., Algora A., Balibrea-Correa J., Benito J., Borge M.J.G., Briz J.A., Calviño F., Cano-Ott D., De Blas A., Domingo-Pardo C., Fernández B., Garcia R., García G., Gómez-Camacho J., González-Romero E.M., Guerrero C., Lerendegui-Marco J., Llanos M., Martínez T., Mendoza E., Murias J.R., Orrigo S.E.A., Pérez de Rada A., Pesudo V., Plaza J., Quesada J.M., Sánchez A., Sánchez-Tembleque V., Santorelli R., Tengblad O., Udías J.M., and Villamarín D.

Subjects
Physics, QC1-999
Abstract

miniBELEN is a modular and transportable neutron moderated counter with a nearly flat neutron detection efficiency up to 10 MeV. Modularity implies that the moderator can be reassembled in different ways in order to obtain different types of response. The detector has been developed in the context of the Measurement of Alpha Neutron Yields (MANY) collaboration, which is a scientific effort aiming to carry out measurements of (𝛼, 𝑛) production yields, reaction cross-sections and neutron energy spectra. In this work we present and discuss several configurations of the miniBELEN detector. The experimental validation of the efficiency calculations using 252Cf sources and the measurement of the 27Al(𝛼, 𝑛) 30P reaction is also presented.

Published
2023
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7. Beta decay along the N=Z line and its relevance in rp-process and X-Ray bursts

Author

Nácher E., Parra S., Briz J.A., Aguilera P., Agramunt J., Algora A., Berry T., Borge M.J.G., Carmona M., Fraile L.M., Ganioglu E., Gelletly W., Guadilla V., Illana A., Lică R., Marroquín I., Molina F., Morales A.I., Orce N., Orrigo S.E.J., Perea A., Romero J., Rubio B., Sotty C., Taín J.L., Tengblad O., and Tolosa A.

Subjects
Physics, QC1-999
Abstract

Nucleosynthesis in Type I X-ray bursts (XRB) proceeds eventually through the rp-process near the proton drip-line. Several N=Z nuclei act as waiting points in the reaction network chain. Astrophysical calculations of XRB light curves depend upon the theoretical modelling of the beta decays of interest, with the N=Z waiting points 64Ge, 68Se, 72Kr, 76Sr, and their second-neighbours N=Z+2 being key nuclei in this context. We have carried out different experimental campaigns at ISOLDE (CERN) to determine the B(GT) distributions, in the decay of several N=Z, N=Z+2 and their daughters, of particular relevance in rp-process calculations. To this aim the Total Absorption Spectroscopy technique is applied. Here we present results on the beta decay of 64Ga and the status of the analysis of 64Ge. Our results provide benchmarks for testing and constraining models under terrestrial conditions that can be used later for predictions in stellar environments.

Published
2023
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8. Tl concentration and its variation in a CsI(Tl) crystal for the CALIFA detector

Author

Knyazev, A., Park, J., Golubev, P., Pallon, J., Cederkall, J., Alvarez-Pol, H., Benlliure, J., Briz, J.A., Cabanelas, P., Casarejos, E., Cortina-Gil, D., Fernández, P. Díaz, Feijoo, M., Galaviz, D., Galiana, E., Borge, M.J.G., Gernhäuser, R., Gonzalez, D., Gutierrez-Neira, C., Hartig, A.-L., Heinz, A., Heiss, B., Johansson, H., Klenze, P., Kröll, T., Nilsson, T., Perea, A., Ponnath, L., Rhee, H.-B., Rodriguez-Sanchez, J.L., Tengblad, O., and Teubig, P.

Published
2020
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9. Characterization and performance of the DTAS detector

Author

Guadilla, V., Tain, J.L., Algora, A., Agramunt, J., Äystö, J., Briz, J.A., Cucoanes, A., Eronen, T., Estienne, M., Fallot, M., Fraile, L.M., Ganioğlu, E., Gelletly, W., Gorelov, D., Hakala, J., Jokinen, A., Jordan, D., Kankainen, A., Kolhinen, V., Koponen, J., Lebois, M., Le Meur, L., Martinez, T., Monserrate, M., Montaner-Pizá, A., Moore, I., Nácher, E., Orrigo, S.E.A., Penttilä, H., Pohjalainen, I., Porta, A., Reinikainen, J., Reponen, M., Rice, S., Rinta-Antila, S., Rubio, B., Rytkönen, K., Shiba, T., Sonnenschein, V., Sonzogni, A.A., Valencia, E., Vedia, V., Voss, A., Wilson, J.N., and Zakari-Issoufou, A.-A.

Published
2018
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10. Suppression of Coulomb-nuclear interference in the near-barrier elastic scattering of 17Ne from 208Pb

Author

Ovejas, J.D., primary, Martel, I., additional, Dell'Aquila, D., additional, Acosta, L., additional, Aguado, J.L., additional, de Angelis, G., additional, Borge, M.J.G., additional, Briz, J.A., additional, Chbihi, A., additional, Colucci, G., additional, Díaz-Martín, C., additional, Figuera, P., additional, Galaviz, D., additional, García-Ramos, C., additional, Gómez-Galán, J.A., additional, Gonzales, C.A., additional, Goyal, N., additional, Keeley, N., additional, Kemper, K.W., additional, Kurtukian Nieto, T., additional, Malenica, D.J., additional, Mazzocco, M., additional, Nurkić, D., additional, Orduz, A.K., additional, Ortiz, A., additional, Palada, L., additional, Parascandolo, C., additional, Di Pietro, A., additional, Rodriguez, A.M., additional, Rusek, K., additional, Salguero, F., additional, Sánchez-Benítez, A.M., additional, Sánchez-Raya, M., additional, Sánchez-Segovia, J., additional, Soić, N., additional, Soramel, F., additional, Stanoiu, M., additional, Tengblad, O., additional, Vukman, N., additional, and Xarepe, M., additional

Published
2023
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11. Characterization of a cylindrical plastic β-detector with Monte Carlo simulations of optical photons

Author

Guadilla, V., Algora, A., Tain, J.L., Agramunt, J., Äystö, J., Briz, J.A., Cucoanes, A., Eronen, T., Estienne, M., Fallot, M., Fraile, L.M., Ganioğlu, E., Gelletly, W., Gorelov, D., Hakala, J., Jokinen, A., Jordan, D., Kankainen, A., Kolhinen, V., Koponen, J., Lebois, M., Martinez, T., Monserrate, M., Montaner-Pizá, A., Moore, I., Nácher, E., Orrigo, S.E.A., Penttilä, H., Pohjalainen, I., Porta, A., Reinikainen, J., Reponen, M., Rinta-Antila, S., Rubio, B., Rytkönen, K., Shiba, T., Sonnenschein, V., Valencia, E., Vedia, V., Voss, A., Wilson, J.N., and Zakari-Issoufou, A.-A.

Published
2017
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12. Suppression of Coulomb-nuclear interference in the near-barrier elastic scattering of Ne from Pb

Author

Ovejas, J.D., Martel, I., Dell'Aquila, D., Acosta, L., Aguado, J.L., de Angelis, G., Borge, M.J.G., Briz, J.A., Chbihi, A., Colucci, G., Díaz-Martín, C., Figuera, P., Galaviz, D., García-Ramos, C., Gómez-Galán, J.A., Gonzales, C.A., Goyal, N., Keeley, N., Kemper, K.W., Kurtukian Nieto, T., Malenica, D.J., Mazzocco, M., Nurkić, D., Orduz, A.K., Ortiz, A., Palada, L., Parascandolo, C., Di Pietro, A., Rodriguez, A.M., Rusek, K., Salguero, F., Sánchez-Benítez, A.M., Sánchez-Raya, M., Sánchez-Segovia, J., Soić, N., Soramel, F., Stanoiu, M., Tengblad, O., Vukman, N., and Xarepe, M.

Abstract

The proton drip-line nucleus $^{17}$Ne is considered a good candidate for a Borromean two-proton halo with a $^{15}$O + p + p structure. Angular distributions of the elastic scattering and inclusive $^{15}$O production for a 136 MeV $^{17}$Ne beam incident on a $^{208}$Pb target were measured for the first time at the SPIRAL1 facility, GANIL. Use of the GLORIA detector array allowed high-resolution data over a wide angular range from 20∘ up to 95∘ in the laboratory frame to be obtained. The elastic scattering angular distribution shows similarities with those for both $^{6}$He and $^{20}$Ne at equivalent collision energies with respect to the corresponding Coulomb barriers, exhibiting the suppression of the Coulomb rainbow peak characteristic of strong coupling. Optical model and coupled channel fits suggest that this is due to a combination of coupling to low-lying quadrupole resonances and Coulomb dipole coupling to the low-lying continuum, although their relative importance depends on the relevant B(E2) values which remain to be firmly determined.

Published
2023

13. Results of DTAS Campaign at IGISOL: Overview

Author

Guadilla, V., primary, Algora, A., additional, Fallot, M., additional, Tain, J.L., additional, Agramunt, J., additional, Äystö, J., additional, Briz, J.A., additional, Cucoanes, A., additional, Eronen, T., additional, Estienne, M., additional, Fraile, L.M., additional, Ganioğlu, E., additional, Gelletly, W., additional, Gorelov, D., additional, Hakala, J., additional, Jokinen, A., additional, Jordan, D., additional, Kankainen, A., additional, Kolhinen, V., additional, Koponen, J., additional, Lebois, M., additional, Le Meur, L., additional, Martinez, T., additional, Monserrate, M., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nácher, E., additional, Orrigo, S.E.A., additional, Penttilä, H., additional, Pohjalainen, I., additional, Porta, A., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rubio, B., additional, Rytkönen, K., additional, Shiba, T., additional, Sonnenschein, V., additional, Sonzogni, A.A., additional, Valencia, E., additional, Vedia, V., additional, Voss, A., additional, Wilson, J.N., additional, and Zakari-Issoufou, A.-A., additional

Published
2023
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14. First experiment with the NUSTAR/FAIR Decay Total Absorption [formula omitted]-Ray Spectrometer (DTAS) at the IGISOL IV facility

Author

Guadilla, V., Algora, A., Tain, J.L., Agramunt, J., Äystö, J., Briz, J.A., Cano-Ott, D., Cucoanes, A., Eronen, T., Estienne, M., Fallot, M., Fraile, L.M., Ganioglu, E., Gelletly, W., Gorelov, D., Hakala, J., Jokinen, A., Jordan, D., Kankainen, A., Kolhinen, V., Koponen, J., Lebois, M., Martinez, T., Monserrate, M., Montaner-Pizá, A., Moore, I., Nácher, E., Orrigo, S., Penttilä, H., Podolyak, Zs., Pohjalainen, I., Porta, A., Regan, P., Reinikainen, J., Reponen, M., Rinta-Antila, S., Rubio, B., Rytkönen, K., Shiba, T., Sonnenschein, V., Sonzogni, A.A., Valencia, E., Vedia, V., Voss, A., Wilson, J.N., and Zakari-Issoufou, A.-A.

Published
2016
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15. Suppression of Coulomb-nuclear interference in the near-barrier elastic scattering of $^{17}$Ne from$^{208}$Pb

Author

Díaz-Ovejas, J, Martel, I, Dell'Aquila, D, Acosta, L, Aguado, J.L, de Angelis, G, Borge, M.J.G, Briz, J.A, Chbihi, A, Colucci, G, Díaz-Martín, C, Figuera, P, Galaviz, D, García-Ramos, C, Gómez-Galán, J.A, Gonzales, C.A, Goyal, N, Keeley, N, Kemper, K.W, Kurtukian Nieto, T, Malenica, D.J, Mazzocco, M, Nurkić, D, Orduz, A.K, Ortiz, A, Palada, L, Parascandolo, C, Di Pietro, A, Rodriguez, A.M, Rusek, K, Salguero, F, Sánchez-Benítez, A.M, Sánchez-Raya, M, Sánchez-Segovia, J, Soić, N, Soramel, F, Stanoiu, M, Tengblad, O, Vukman, N, Xarepe, M, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Optical model, Elastic scattering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Direct nuclear reactions, Radioactive beams
Abstract

International audience; The proton drip-line nucleus 17Ne is considered a good candidate for a Borromean two-proton halo with a 15O + p + p structure. Angular distributions of the elastic scattering and inclusive 15O production for a 136 MeV 17Ne beam incident on a 208Pb target were measured for the first time at the SPIRAL1 facility, GANIL. Use of the GLORIA detector array allowed high-resolution data over a wide angular range from 20∘ up to 95∘ in the laboratory frame to be obtained. The elastic scattering angular distribution shows similarities with those for both 6He and 20Ne at equivalent collision energies with respect to the corresponding Coulomb barriers, exhibiting the suppression of the Coulomb rainbow peak characteristic of strong coupling. Optical model and coupled channel fits suggest that this is due to a combination of coupling to low-lying quadrupole resonances and Coulomb dipole coupling to the low-lying continuum, although their relative importance depends on the relevant B(E2) values which remain to be firmly determined.

Published
2023

16. miniBELEN: A modular neutron counter for (휶, 풏) reactions.

Author

Mont-Geli, N., Tarifeño-Saldivia, A., Fraile, L.M., Viñals, S., Perea, A., Pallàs, M., Cortés, G., Nácher, E., Tain, J.L., Alcayne, V., Algora, A., Balibrea-Correa, J., Benito, J., Borge, M.J.G., Briz, J.A., Calviño, F., Cano-Ott, D., De Blas, A., Domingo-Pardo, C., and Fernández, B.

Subjects
NEUTRON counters, NUCLEAR reactions, NUCLEAR cross sections, NEUTRON temperature, NUCLEAR counters
Abstract

miniBELEN is a modular and transportable neutron moderated counter with a nearly flat neutron detection efficiency up to 10 MeV. Modularity implies that the moderator can be reassembled in different ways in order to obtain different types of response. The detector has been developed in the context of the Measurement of Alpha Neutron Yields (MANY) collaboration, which is a scientific effort aiming to carry out measurements of (훼, 푛) production yields, reaction cross-sections and neutron energy spectra. In this work we present and discuss several configurations of the miniBELEN detector. The experimental validation of the efficiency calculations using 252Cf sources and the measurement of the 27Al(훼, 푛) 30P reaction is also presented. [ABSTRACT FROM AUTHOR]

Published
2023
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17. CALIFA, a Dedicated Calorimeter for the R3B/FAIR

Author

Cortina-Gil, D., Alvarez-Pol, H., Aumann, T., Avdeichikov, V., Bendel, M., Benlliure, J., Bertini, D., Bezbakh, A., Bloch, T., Böhmer, M., Borge, M.J.G., Briz, J.A., Cabanelas, P., Casarejos, E., Carmona Gallardo, M., Cederkäll, J., Chulkov, L., Dierigl, M., Di Julio, D., Durán, I., Fiori, E., Fomichev, A., Galaviz, D., Gascón, M., Gernhäuser, R., Gerl, J., Golubev, P., Golovkov, M., González, D., Gorshkov, A., Heinz, A., Heil, M., Henning, W., Ickert, G., Ignatov, A., Jakobsson, B., Johansson, H.T., Kröll, Th., Krücken, R., Krupko, S., Kurz, N., Le Bleis, T., Löher, B., Nacher, E., Nilsson, T., Parrilla, C., Perea, A., Pietralla, N., Pietras, B., Reifarth, R., Sanchez del Rio, J., Savran, D., Sidorchuk, S., Simon, H., Schnorrenberger, L., Tengblad, O., Teubig, P., Thies, R., Vilán, J.A., von Schmid, M., Winkel, M., Winkler, S., Wamers, F., and Yañez, P.

Published
2014
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19. Proton radiographs using position-sensitive silicon detectors and high-resolution scintillators

Author

Briz, J.A., primary, Nerio, A.N., additional, Ballesteros, C., additional, Borge, M.J.G., additional, Martinez, P., additional, Perea, A., additional, Tavora, V.G., additional, Tengblad, O., additional, Ciemala, M., additional, Maj, A., additional, Olko, P., additional, Parol, W., additional, Pedracka, A., additional, Sowicki, B., additional, Zieblinski, M., additional, and Nacher, E., additional

Published
2022
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20. Studies of fission fragment yields via high-resolution γ-ray spectroscopy

Author

Wilson J.N., Lebois M., Qi L., Amador-Celdran P, Bleuel D., Briz J.A., Carroll R., Catford W., Witte H. De, Doherty D.T., Eloirdi R., Georgiev G., Gottardo A., Goasduff A., Hadyñska-Klek K., Hauschild K., Hess H., Ingeberg V., Konstantinopoulos T., Ljungvall J., Lopez-Martens A., Lorusso G., Lozeva R., Lutter R., Marini P., Matea I., Materna T., Mathieu L., Oberstedt A., Oberstedt S., Panebianco S., Podolyak Zs., Porta A., Regan P.H., Reiter P., Rezynkina K., Rose S.J., Sahin E., Seidlitz M., Serot O., Shearman R., Siebeck B., Siem S., Smith A.G., Tveten G.M., Verney D., Warr N., Zeiser F., and Zielinska M.

Subjects
Physics, QC1-999
Abstract

Precise spectroscopic information on the fast neutron induced fission of the 238U(n,f) reaction was recently gained using a new technique which involved coupling of the Miniball high resolution y-ray spectrometer and the LICORNE directional neutron source. The experiment allowed measurement of the isotopic fission yields for around 40 even-even nuclei at an incident neutron energy of around 2 MeV where yield data are very sparse. In addition spectroscopic information on very neutron-rich fission products was obtained. Results were compared to models, both the JEFF-3.1.1 data base and the GEF code, and large discrepancies for the S1 fission mode in the Sn/Mo isotope pair were discovered. This suggests that current models are overestimating the role played by spherical shell effects in fast neutron induced fission. In late 2017 and 2018 the nu-ball hybrid spectrometer will be constructed at the IPN Orsay to perform further experimental investigations with directional neutrons coupled to a powerful hybrid Ge/LaBr3 detector array. This will open up new possibilities for measurements of fission yields for fast-neutron-induced fission using the spectroscopic technique and will be complimentary to other methods being developed.

Published
2018
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21. Total absorption gamma-ray spectroscopy study of the -decay of Hg

Author

Algora, A., Ganioğlu, E., Sarriguren, P., Guadilla, V., Fraile, L.M., Nácher, E., Rubio, B., Tain, J.L., Agramunt, J., Gelletly, W., Briz, J.A., Cakirli, R.B., Fallot, M., Jordán, D., Halász, Z., Kuti, I., Montaner, A., Onillon, A., Orrigo, S.E.A., Perez Cerdan, A., Rice, S., Vedia, V., and Valencia, E.

Abstract

The Gamow-Teller strength distribution of the decay of $^{186}$Hg into $^{186}$Au has been determined for the first time using the total absorption gamma spectroscopy technique and has been compared with theoretical QRPA calculations using the SLy4 Skyrme force. The measured Gamow-Teller strength distribution and the half-life are described by mixing oblate and prolate configurations independently in the parent and daughter nuclei. In this theoretical framework the best description of the experimental beta strength is obtained with dominantly prolate components for both parent $^{186}$Hg and daughter $^{186}$Au. The approach also allowed us to determine an upper limit of the oblate component in the parent state. The complexity of the analysis required the development of a new approach in the analysis of the X-ray gated total absorption spectrum.

Published
2021

22. Total absorption gamma-ray spectroscopy study of the β-decay of 186Hg

Author

Algora, A., Ganioğlu, E., Sarriguren, P., Guadilla, V., Fraile, L.M., Nácher, E., Rubio, B., Tain, J.L., Agramunt, J., Gelletly, W., Briz, J.A., Cakirli, R.B., Fallot, M., Jordán, D., Halász, Z., Kuti, I., Montaner, A., Onillon, A., Orrigo, S.E.A., Perez Cerdan, A., Rice, S., Vedia, V., and Valencia, E.

Published
2021
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23. Strong γ-ray emission from neutron unbound states populated in β-decay: Impact on (n,γ) cross-section estimates

Author

Tain J.L., Guadilla V., Valencia E., Algora A., Zakari-Issoufou A.-A., Rice S., Meur L. Le, Agramunt J., Äystö J., Batist L., Bowry M., Briz J.A., Bui V.M., Caballero-Folch R., Cano-Ott D., Cucoanes A., Elomaa V.-V., Eronen T., Estevez E., Estienne M., Fallot M., Farrelly G.F., Fraile L.M., Ganioglu E., Garcia A.R., Gelletly W., Gómez-Hornillos B., Gorelov D., Gorlychev V., Hakala J., Jokinen A., Jordan M.D., Kankainen A., Kolhinen V.S., Kondev F.G., Koponen J., Lebois M., Martínez T., Mason P., Mendoza E., Monserrate M., Montaner-Pizá A., Moore I., Nacher E., Orrigo S.E.A., Penttilä H., Podolyák Zs., Pohjalainen I., Porta A., Regan P.H., Reinikainen J., Reponen M., Rinta-Antila S., Rissanen J., Rubio B., Rytkönen K., Shiba T., Sonnenschein V., Sonzogni A.A., Vedia V., Voss A., and Wilson J.N.

Subjects
Physics, QC1-999
Abstract

Total absorption gamma-ray spectroscopy is used to measure accurately the intensity of γ emission from neutron-unbound states populated in the β-decay of delayed-neutron emitters. From the comparison of this intensity with the intensity of neutron emission one can deduce information on the (n,γ) cross section for unstable neutron-rich nuclei of interest in r process abundance calculations. A surprisingly large γ branching was observed for a number of isotopes. The results are compared with Hauser-Feshbach calculations and discussed.

Published
2017
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24. TAGS measurements of 100Nb ground and isomeric states and 140Cs for neutrino physics with the new DTAS detector

Author

Guadilla V., Algora A., Tain J.L., Agramunt J., Äystö J., Briz J.A., Cucoanes A., Eronen T., Estienne M., Fallot M., Fraile L.M., Ganioğlu E., Gelletly W., Gorelov D., Hakala J., Jokinen A., Jordan D., Kankainen A., Kolhinen V., Koponen J., Lebois M., Martinez T., Monserrate M., Montaner-Pizá A., Moore I., Nácher E., Orrigo S.E.A., Penttilä H., Pohjalainen I., Porta A., Reinikainen J., Reponen M., Rinta-Antila S., Rubio B., Rytkönen K., Shiba T., Sonnenschein V., Sonzogni A.A., Valencia E., Vedia V., Voss A., Wilson J.N., and Zakari-Issoufou A.-A.

Subjects
Physics, QC1-999
Abstract

In this work we report on total absorption γ-ray spectroscopy measurements of the β decay of fission products that are important contributors to the antineutrino spectrum. The experiment was performed at IGISOL as a part of a campaign of measurements with the new DTAS spectrometer. Preliminary results of the analysis of the β decay of 100Nb,100mNb and 140Cs are presented.

Published
2017
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25. Total absorption studies of high priority decays for reactor applications: 86Br and 91Rb

Author

Algora A., Rice S., Guadilla V., Tain J.L., Valencia E., Zakari-Issoufou A.-A., Agramunt J., Äystö J., Batist L., Briz J.A., Bowry M., Bui V.M., Caballero-Folch R., Cano-Ott D., Cucoanes A., Eronen T., Elomaa V.V., Estevez E., Estienne M., Fallot M., Farrelly G.F., Fraile L.M., Fleming M., Ganioglu E., Garcia A.R., Gelletly W., Gómez-Hornillos B., Gorelov D., Gorlychev V., Hakala J., Jokinen A., Jordan D., Kankainen A., Kolhinen V.S., Kondev F.G., Koponen J., Lebois M., Martinez T., Mason P., Mendoza E., Monserrate M., Montaner-Pizá A., Moore I., Nácher E., Orrigo S.E.A., Penttilä H., Podolyák Z., Pohjalainen I., Porta A., Regan P.H., Reinikainen J., Reponen M., Rinta-Antila S., Rissanen J., Rubio B., Rytkönen K., Shiba T., Sonnenschein V., Sonzogni A.A., Sublet J.-Ch., Vedia V., Voss A., and Wilson J.N.

Subjects
Physics, QC1-999
Abstract

Preliminary results from beta decay studies of nuclei that are important for reactor applications are presented. The beta decays have been studied using the total absorption technique (TAS) and the pure beams provided by the JYFLTRAP system at the IGISOL facility of the University of Jyväskylä.

Published
2017
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26. Total Absorption Spectroscopy of Fission Fragments Relevant for Reactor Antineutrino Spectra and Decay Heat Calculations

Author

Porta A., Zakari-Issoufou A.-A., Fallot M., Algora A., Tain J.L., Valencia E., Rice S., Bui V.M., Cormon S., Estienne M., Agramunt J., Äystö J., Bowry M., Briz J.A., Caballero-Folch R., Cano-Ott D., Cucouanes A., Elomaa V.-V., Eronen T., Estévez E., Farrelly G.F., Garcia A.R., Gelletly W., Gomez-Hornillos M.B, Gorlychev V., Hakala J., Jokinen A., Jordan M.D., Kankainen A., Karvonen P., Kolhinen V.S., Kondev F.G., Martinez T., Mendoza E., Molina F., Moore I., Perez-Cerdán A. B., Podolyák Zs., Penttilä H., Regan P.H., Reponen M., Rissanen J., Rubio B., Shiba T., Sonzogni A.A., and Weber C.

Subjects
Physics, QC1-999
Abstract

Beta decay of fission products is at the origin of decay heat and antineutrino emission in nuclear reactors. Decay heat represents about 7% of the reactor power during operation and strongly impacts reactor safety. Reactor antineutrino detection is used in several fundamental neutrino physics experiments and it can also be used for reactor monitoring and non-proliferation purposes. 92,93Rb are two fission products of importance in reactor antineutrino spectra and decay heat, but their β-decay properties are not well known. New measurements of 92,93Rb β-decay properties have been performed at the IGISOL facility (Jyväskylä, Finland) using Total Absorption Spectroscopy (TAS). TAS is complementary to techniques based on Germanium detectors. It implies the use of a calorimeter to measure the total gamma intensity de-exciting each level in the daughter nucleus providing a direct measurement of the beta feeding. In these proceedings we present preliminary results for 93Rb, our measured beta feedings for 92Rb and we show the impact of these results on reactor antineutrino spectra and decay heat calculations.

Published
2016
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27. Investigating shape coexistence in $^{80,82}$Sr \\with $\beta^+/EC$ decay spectroscopy

Author

Bernier, Nikita, Bucher, Daphney, Orce, Nico, Evitts, L.J., Kibédi, T., Garrett, P.E., Rodrguez, T.R., Abrahams, K.J., Akakpo, E.H., Algora, A., Andreyev, A., Bidaman, H., Bildstein, V., Borge, M.J.G., Buck, S., Briscoe, A., Briz, J.A., Chrysalidis, K., Cubiss, J., Fraile, L.M., Henderson, J., Illana, A., Jenkins, D.G., Korgul, A., Lica, R., Mehl, C.V., Miernik, K., Morales, A.I., Nácher, E., Ngwetsheni, C., Ntshangase, S.S., Ojala, J., Olaizola, B., Orrigo, S., Page, R., Pakarinen, J., Piersa, M., Radich, A., Rothe, S., Rubio, B., Smallcombe, J., Stryjczyk, M., Triambak, S., Valbuena, S., and Wadsworth, R.

Subjects
Detectors and Experimental Techniques
Published
2020

28. Populating α-unbound states in 16O via 19F (p, αy)16O reaction.

Author

Távora, V.G., Tengblad, O., Borge, M.J.G., Briz, J.A., Fernandez Ruiz, D., Jensen, E.A.M., Nerio, A.N., and Perea, A.

Subjects
CROSS-sectional method, THRESHOLD energy, SILICON, PROTON beams, SCINTILLATORS
Abstract

The 12C(α, y)16O reaction is important in the production of universal 16O, but its cross-section at the relevant energies of static helium burning is complex and uncertain. The total cross-section originates from a sum of resonance tails and direct captures, making the contributions of sub-threshold states difficult to estimate. One proposed method to estimate these contributions involves determining relevant reduced α-widths of the sub-threshold states through indirect measurements. Therefore, 19F(p, αy)16O reaction was used to populate α-unbound states in 16O using a 2.6 MeV proton beam on a CaF2 target. A detection system consisting of single and telescope configurations of Si detectors was used to detect 2α-particles and a 12C particle in coincidence. Scintillator detectors were included in the setup to study the de-excitation of the states populated in 16O to the ground state. Under good event conditions a preliminar indentification of the particles detected has been conducted. [ABSTRACT FROM AUTHOR]

Published
2023
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29. Large Impact of the Decay of Niobium Isomers on the Reactor ${\overline{{\nu}}}_{e}$ Summation Calculations

Author

Guadilla, V., Algora, A., Tain, J.L., Estienne, Magali, Fallot, Muriel, Sonzogni, A.A., Agramunt, J., Äystö, J., Briz, J.A., Cucoanes, A., Eronen, T., Fraile, L.M., Ganioğlu, E., Gelletly, W., Gorelov, D., Hakala, J., Jokinen, A., Jordan, D., Kankainen, A., Kolhinen, V., Koponen, J., Lebois, M., Le Meur, L., Martinez, T., Monserrate, M., Montaner-Pizá, A., Moore, I., Nácher, E., Orrigo, S.E.A., Penttilä, H., Pohjalainen, I., Porta, Amanda, Reinikainen, J., Reponen, M., Rinta-Antila, S., Rubio, B., Rytkönen, K., Shiba, T., Sonnenschein, V., Valencia, E., Vedia, V., Voss, A., Wilson, J.N., Zakari-Issoufou, A.A., Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Penning trap, energy: ground state, particle separator, antineutrino: nuclear reactor, semileptonic decay, antineutrino: energy spectrum, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, niobium, experimental results, energy: transition, Nuclear Physics
Abstract

International audience; Even mass neutron-rich niobium isotopes are among the principal contributors to the reactor antineutrino energy spectrum. They are also among the most challenging to measure due to the refractory nature of niobium, and because they exhibit isomeric states lying very close in energy. The β-intensity distributions of Nb100gs,100m and Nb102gs,102m β decays have been determined using the total absorption γ-ray spectroscopy technique. The measurements were performed at the upgraded Ion Guide Isotope Separator On-Line facility at the University of Jyväskylä. Here, the double Penning trap system JYFLTRAP was employed to disentangle the β decay of the isomeric states. The new data obtained in this challenging measurement have a large impact in antineutrino summation calculations. For the first time the discrepancy between the summation model and the reactor antineutrino measurements in the region of the shape distortion has been reduced.

Published
2019

30. Beta decay studies of the N=Z and waiting point nucleus 72Kr

Author

Briz J.A., Borge M.J.G., Nácher E., Algora A., and Rubio B.

Subjects
Physics, QC1-999
Abstract

The β+/EC decay of 72Kr has been studied by means of the Total Absorption gamma Spectroscopy technique in order to determine the Gamow-Teller strength B(GT) distribution. The comparison with theoretical predictions suggests a dominantly oblate deformation for the 72Kr ground state. The de-excitation of low-energy excited states in 72Br is studied via conversion electron spectroscopy. The conversion coefficients and multipolarities of 14 low-energy transitions are determined and the spin and parity of the levels involved are deduced.

Published
2014
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31. Magnetic moment measurement in 72Zn using the Transient Field technique and Coulomb excitation in inverse kinematics

Author

Illana Sisón A., Jungclaus A., Orlandi R., Perea A., Briz J.A., Bauer C., Gernhäuser R., Leske J., Mücher D., Pakarinen J., Pietralla N., Rajabali M.M., Seiler D., and Stahl C.

Subjects
Physics, QC1-999
Abstract

The g factor of the first excited 2+ state of 72Zn has been measured using the Low Velocity Transient Field (LVTF) technique in combination with Coulomb excitation in inverse kinematics. The aim of the experiment was to test the viability of this method when applied to short-lived radioactive ISOL beams, in particular in comparison to the alternative High Velocity Transient Field (HVTF) technique using fragment beams. The result obtained for g(2+) in 72Zn in the present experiment follows the trend observed for the lighter stables Zn isotopes.

Published
2014
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33. Search for the $^{73}\mathrm{Ga}$ ground-state doublet splitting in the $\beta$ decay of $^{73}\mathrm{Zn}$

Author

Vedia, V., Paziy, V., Fraile, L.M., Mach, H., Walters, W.B., Aprahamian, A., Bernards, C., Briz, J.A., Bucher, B., Chiara, C.J., Dlouhý, Z., Gheorghe, I., Ghiţă, D., Hoff, P., Jolie, J., Köster, U., Kurcewicz, W., Lică, R., Mărginean, N., Mărginean, R., Olaizola, B., Régis, J.M., Rudigier, M., Sava, T., Simpson, G.S., Stănoiu, M., Stroe, L., Institut Laue-Langevin (ILL), ILL, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), and Université Grenoble Alpes (UGA)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; The existence of two close-lying nuclear states in $^{73}$Ga has recently been experimentally determined: a 1/2$^−$ spin-parity for the ground state was measured in a laser spectroscopy experiment, while a J$^{\pi} = 3/2^−$ level was observed in transfer reactions. This scenario is supported by Coulomb excitation studies, which set a limit for the energy splitting of 0.8 keV. In this work, we report on the study of the excited structure of $^{73}$Ga populated in the $\beta$ decay of $^{73}$Zn produced at ISOLDE, CERN. Using $\beta$-gated, $\gamma$-ray singles, and $\gamma - \gamma$ coincidences, we have searched for energy differences to try to delimit the ground-state energy splitting, providing a more stringent energy difference limit. Three new half-lives of excited states in $^{73}$Ga have been measured using the fast-timing method with LaBr$_3$(Ce) detectors. From our study, we help clarify the excited structure of $^{73}$Ga and we extend the existing $^{73}$Zn decay to $^{73}$Ga with 8 new energy levels and 35 $\gamma$ transitions. We observe a 195-keV transition consistent with a $\gamma$ ray de-exciting a short-lived state in the $\beta$-decay parent $^{73}$Zn.

Published
2017

34. Experimental study of $^{100}$Tc $\beta$ decay with total absorption $\gamma$-ray spectroscopy

Author

Guadilla, V., Algora, A., Tain, J.L., Agramunt, J., Jordan, D., Montaner-Pizá, A., Orrigo, S.E.A., Rubio, B., Valencia, E., Suhonen, J., Civitarese, O., Äystö, J., Briz, J.A., Cucoanes, A., Eronen, T., Estienne, M., Fallot, M., Fraile, L.M., Ganioglu, E., Gelletly, W., Gorelov, D., Hakala, J., Jokinen, A., Kankainen, A., Kolhinen, V., Koponen, J., Lebois, M., Martinez, T., Monserrate, M., Moore, I., Nácher, E., Penttilä, H., Pohjalainen, I., Porta, A., Reinikainen, J., Reponen, M., Rinta-Antila, S., Rytkönen, K., Shiba, T., Sonnenschein, V., Sonzogni, A.A., Vedia, V., Voss, A., Wilson, J.N., Zakari-Issoufou, A.-A, Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique subatomique et des technologies associées ( SUBATECH ), IMT Atlantique Bretagne-Pays de la Loire ( IMT Atlantique ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Nantes ( UN ), Institut de Physique Nucléaire d'Orsay ( IPNO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
density, molybdenum: double-beta decay, excited state: energy, total-absorption counter, random phase approximation: quasiparticle, technetium: semileptonic decay, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], benchmark, efficiency, gamma ray, ground state, spectrometer, branching ratio, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], numerical calculations, phonon, ruthenium, Monte Carlo, experimental results
Abstract

International audience; The β decay of Tc100 has been studied by using the total absorption γ-ray spectroscopy technique at the Ion Guide Isotope Separator On-Line facility in Jyväskylä. In this work the new Decay Total Absorption γ-ray Spectrometer in coincidence with a cylindrical plastic β detector has been employed. The β intensity to the ground state obtained from the analysis is in good agreement with previous high-resolution measurements. However, differences in the feeding to the first-excited state as well as weak feeding to a new level at high excitation energy have been deduced from this experiment. Theoretical calculations performed in the quasiparticle random-phase approximation framework are also reported. Comparison of these calculations with our measurement serves as a benchmark for calculations of the double β decay of Mo100.

Published
2017

35. Search for shape-coexisting 0$^+$ states in $^{66}$Ni from lifetime measurements

Author

Olaizola, B., Fraile, L.M., Mach, H., Poves, A., Nowacki, F., Aprahamian, A., Briz, J.A., Cal-González, J., Ghiţa, D., Köster, U., Kurcewicz, W., Lesher, S.R., Pauwels, D., Picado, E., Radulov, D., Simpson, G.S., Udías, J.M., Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), ILL, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), and Université Grenoble Alpes (UGA)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; The lifetime of the 0$_3^+$ state in $^{66}$Ni, two neutrons below the $N=40$ subshell gap, has been measured. The transition $B(E2;0_3^+ \rightarrow 2_1^+)$ is one of the most hindered E2 transitions in the Ni isotopic chain and it implies that, unlike $^{68}$Ni, there is a spherical structure at low excitation energy. We have performed extensive shell-model calculations that correctly predict this result, obtaining a spherical 0$^+$ state at the correct energy and with an extremely low $B(E2;0_3^+ \rightarrow 2_1^+)$ value.

Published
2017

36. Be11(βp), a quasi-free neutron decay?

Author

Riisager, K., Forstner, O., Borge, M.J.G., Briz, J.A., Carmona-Gallardo, M., Fraile, L.M., Fynbo, H.O.U., Giles, T., Gottberg, A., Heinz, A., Johansen, J.G., Jonson, B., Kurcewicz, J., Lund, M.V., Nilsson, T., Nyman, G., Rapisarda, E., Steier, P., Tengblad, O., Thies, R., and Winkler, S.R.

Subjects
Nuclear and High Energy Physics
Published
2014
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37. Decay of the $N=126, ^{213}$Fr nucleus

Author

Pragati, A., Deo, A.Y., Podolyák, Zs., Walker, P.M., Algora, A., Rubio, B., Agramunt, J., Fraile, L.M., Al-Dahan, N., Alkhomashi, N., Briz, J.A., Estevez Aguado, M.E., Farrelly, G., Gelletly, W., Herlert, A., Köster, U., Maira, A., Institut Laue-Langevin (ILL), and ILL

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; γ rays following the EC/β+ and α decay of the $N = 126, ^{213}$Fr nucleus have been observed at the CERN isotope separator on-line (ISOLDE) facility with the help of γ-ray and conversion-electron spectroscopy. These γ rays establish several hitherto unknown excited states in $^{213}$Rn. Also, five new α-decay branches from the $^{213}$Fr ground state have been discovered. Shell model calculations have been performed to understand the newly observed states in $^{213}$Fr.

Published
2016

38. Systematic trends in beta-delayed particle emitting nuclei: The case of βpα emission from 21 Mg

Author

Lund, M.V.Department of Physics and Astronomy, Aarhus University, Aarhus C, DK-8000, Denmark, Borge, M.J.G.(ISOLDE, PH Department, CERN, Geneve 23, CH-1211, Switzerland), Briz, J.A.(Instituto de Estructura de la Materia, CSIC, Madrid, E-28006, Spain), Cederkäll, J.(Department of Nuclear Physics, Lund University, Lund, SE-221 00, Sweden), Fynbo, H.O.U.(Department of Physics and Astronomy, Aarhus University, Aarhus C, DK-8000, Denmark), Jensen, J.H.(Department of Physics and Astronomy, Aarhus University, Aarhus C, DK-8000, Denmark), Jonson, B.(Fundamental Fysik, Chalmers Tekniska Högskola, Göteborg, SE-41296, Sweden), Laursen, K.L.(Department of Physics and Astronomy, Aarhus University, Aarhus C, DK-8000, Denmark), Nilsson, T.(Fundamental Fysik, Chalmers Tekniska Högskola, Göteborg, SE-41296, Sweden), Perea, A.(Instituto de Estructura de la Materia, CSIC, Madrid, E-28006, Spain), Pesudo, V.(Instituto de Estructura de la Materia, CSIC, Madrid, E-28006, Spain), Riisager, K.(Department of Physics and Astronomy, Aarhus University, Aarhus C, DK-8000, Denmark), and Tengblad, O.(Instituto de Estructura de la Materia, CSIC, Madrid, E-28006, Spain)

Subjects
Physics::Accelerator Physics, Nuclear Experiment
Abstract

We have observed β+ -delayed α and pα emission from the proton-rich nucleus 21 Mg produced at the ISOLDE facility at CERN. The assignments were cross-checked with a time distribution analysis. This is the third identified case of βpα emission. We discuss the systematic of beta-delayed particle emission decays, show that our observed decays fit naturally into the existing pattern, and argue that the patterns are to a large extent caused by odd–even effects.

Published
2015

39. Production and Study of Neutron-rich Nuclei Using the LICORNE Directional Neutron Source

Author

Wilson, J.N., primary, Lebois, M., additional, Qi, L., additional, Amador-Celdran, P., additional, Bleuel, D., additional, Briz, J.A., additional, Carroll, R., additional, Catford, W., additional, De Witte, H., additional, Doherty, D., additional, Eloirdi, R., additional, Georgiev, G., additional, Gottardo, A., additional, Goasduff, A., additional, Hadynska-Klek, K., additional, Hauschild, K., additional, Hess, M., additional, Ingeberg, V., additional, Konstantinopoulos, T., additional, Ljungvall, J., additional, Lopez-Martens, A., additional, Lorusso, G., additional, Lozeva, R., additional, Lutter, R., additional, Marini, P., additional, Matea, I., additional, Materna, T., additional, Mathieu, L., additional, Oberstedt, A., additional, Oberstedt, S., additional, Panebianco, S., additional, Podolyak, Z., additional, Porta, A., additional, Regan, P.H., additional, Reiter, P., additional, Rezynkina, K., additional, Rose, S.J., additional, Sahin, E., additional, Seidlitz, M., additional, Shearman, R., additional, Siebeck, B., additional, Siem, S., additional, Smith, A.G., additional, Tveten, G.M., additional, Verney, D., additional, Warr, N., additional, Zeiser, F., additional, and Zielinska, M., additional

Published
2017
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40. Total absorption spectroscopy of fission fragments relevant for reactor antineutrino spectra

Author

Fallot, M., primary, Porta, A., additional, Meur, L. Le, additional, Briz, J.A., additional, Zakari-Issoufou, A.-A., additional, Guadilla, V., additional, Algora, A., additional, Taìn, J.-L., additional, Valencia, E., additional, Rice, S., additional, Bui, V.M., additional, Cormon, S., additional, Estienne, M., additional, Agramunt, J., additional, Äystö, J., additional, Batist, L., additional, Bowry, M., additional, Caballero-Folch, R., additional, Cano-Ott, D., additional, Cucoanes, A., additional, Elomaa, V.-V., additional, Eronen, T., additional, Estévez, E., additional, Farrelly, G.F., additional, Fraile, L.M., additional, Fleming, M., additional, Ganogliu, E., additional, Garcia, A.R., additional, Gelletly, W., additional, Gomez-Hornillos, M.B., additional, Gorelov, D., additional, Gorlychev, V., additional, Hakala, J., additional, Jokinen, A., additional, Jordan, M.D., additional, Kankainen, A., additional, Karvonen, P., additional, Kolhinen, V.S., additional, Kondev, F.G., additional, Koponen, J., additional, Lebois, M., additional, Martinez, T., additional, Mason, P., additional, Mendoza, E., additional, Molina, F., additional, Monserrate, M., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nácher, E., additional, Orrigo, S.E.A., additional, Penttilä, H., additional, Perez, A., additional, Podolyák, Zs., additional, Pohjalainen, I., additional, Regan, P.H., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rissanen, J., additional, Rubio, B., additional, Shiba, T., additional, Sonnenschein, V., additional, Sonzogni, A.A., additional, Sublet, J.-C., additional, Vedia, V., additional, Voss, A., additional, Weber, C., additional, and Wilson, J.N., additional

Published
2017
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41. Study of the $\beta $ Decay of Fission Products with the DTAS Detector

Author

Guadilla, V., primary, Algora, A., additional, Tain, J.L., additional, Agramunt, J., additional, Äystö, J., additional, Briz, J.A., additional, Cucoanes, A., additional, Eronen, T., additional, Estienne, M., additional, Fallot, M., additional, Fraile, L.M., additional, Ganioğlu, E., additional, Gelletly, W., additional, Gorelov, D., additional, Hakala, J., additional, Jokinen, A., additional, Jordan, D., additional, Kankainen, A., additional, Kolhinen, V., additional, Koponen, J., additional, Lebois, M., additional, Martinez, T., additional, Monserrate, M., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nácher, E., additional, Orrigo, S.E.A., additional, Penttilä, H., additional, Pohjalainen, I., additional, Porta, A., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rubio, B., additional, Rytkönen, K., additional, Shiba, T., additional, Sonnenschein, V., additional, Sonzogni, A.A., additional, Valencia, E., additional, Vedia, V., additional, Voss, A., additional, Wilson, J.N., additional, and Zakari-Issoufou, A.-A., additional

Published
2017
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42. Sizeable beta-strength in 31Ar (β3p) decay

Author

Koldste, G.T., Blank, B., Borge, M.J.G., Briz, J.A., Carmona-Gallardo, M., Fraile, L.M., Fynbo, H.O.U., Giovinazzo, J., Johansen, J.G., Jokinen, A., Jonson, B., Kurturkian-Nieto, T., Nilsson, T., Perea, A., Pesudo, V., Picado, E., Riisager, K., Saastamoinen, A., Tengblad, O., Thomas, J.-C., and Van de Walle, J.

Published
2014
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43. Shapes of the $^{192,190}$Pb ground states from beta decay studies using the total absorption technique

Author

Estevez Aguado, M.E., Algora, A., Agramunt, J., Rubio, B., Tain, J.L., Jordan, D., Fraile, L.M., Gelletly, W., Frank, A., Csatlos, M., Csige, L., Dombradi, Zs., Krasznahorkay, A., Nacher, E., Sarriguren, P., Borge, M.J.G., Briz, J.A., Tengblad, O., Molina, F., Moreno, O., Kowalska, M., Fedosseev, V.N., Marsh, B.A., Fedorov, D.V., Molkanov, P.L., Andreyev, A.N., Seliverstov, M.D., Burkard, K., and Huller, W.

Subjects
FOS: Physical sciences, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The beta decay of $^{192,190}$Pb has been studied using the total absorption technique at the ISOLDE(CERN) facility. The beta-decay strength deduced from the measurements, combined with QRPA theoretical calculations, allow us to infer that the ground states of the $^{192,190}$Pb isotopes are spherical. These results represent the first application of the shape determination method using the total absorption technique for heavy nuclei and in a region where there is considerable interest in nuclear shapes and shape effects. The β decay of Pb192,190 has been studied using the total absorption technique at the ISOLDE (CERN) facility. The β-decay strength deduced from the measurements, combined with QRPA theoretical calculations, allow us to infer that the ground states of the Pb192,190 isotopes are spherical. These results represent the first application of the shape determination method using the total absorption technique for heavy nuclei and in a region where there is considerable interest in nuclear shapes and shape effects. The beta decay of $^{192,190}$Pb has been studied using the total absorption technique at the ISOLDE(CERN) facility. The beta-decay strength deduced from the measurements, combined with QRPA theoretical calculations, allow us to infer that the ground states of the $^{192,190}$Pb isotopes are spherical. These results represent the first application of the shape determination method using the total absorption technique for heavy nuclei and in a region where there is considerable interest in nuclear shapes and shape effects.

Published
2015

44. Systematic trends in beta-delayed particle emitting nuclei: The case of beta-p-alpha emission from 21Mg

Author

Lund, M.V., Borge, M.J.G., Briz, J.A., Cederkäll, J., Fynbo, H.O.U., Jensen, J.H., Jonson, B., Laursen, K.L., Nilsson, T., Perea, A., Pesudo, V., Riisager, K., and Tengblad, O.

Subjects
FOS: Physical sciences, Physics::Accelerator Physics, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

We have observed beta+-delayed alpha and p-alpha emission from the proton-rich nucleus 21Mg produced at the ISOLDE facility at CERN. The assignments were cross-checked with a time distribution analysis. This is the third identified case of beta-p-alpha emission. We discuss the systematic of beta-delayed particle emission decays, show that our observed decays fit naturally into the existing pattern, and argue that the patterns are to a large extent caused by odd-even effects., 6 pages, 5 figures

Published
2015

45. [formula omitted], a quasi-free neutron decay?

Author

Riisager, K., Forstner, O., Borge, M.J.G., Briz, J.A., Carmona-Gallardo, M., Fraile, L.M., Fynbo, H.O.U., Giles, T., Gottberg, A., Heinz, A., Johansen, J.G., Jonson, B., Kurcewicz, J., Lund, M.V., Nilsson, T., Nyman, G., Rapisarda, E., Steier, P., Tengblad, O., Thies, R., and Winkler, S.R.

Published
2014
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46. Low-lying isomeric states in 80Ga from the β− decay of 80Zn

Author

Lica, R., Marginean, N., Ghita, D.G., Mach, H., Fraile, L.M., Simpson, G.S., Aprahamian, A., Bernards, C., Briz, J.A., Bucher, B., Chiara, C.J., Dlouhy, Z., Gheorghe, I., Hoff, P., Jolie, J., Köster, U., Kurcewicz, W., Marginean, R., Olaizola, B., Paziy, V., Régis, J.M., Rudigier, M., Sava, T., Stanoiu, M., Stroe, L., Walters, W.B., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), and ILL

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2014

47. 11Be(beta-p), a quasi-free neutron decay?

Author

Riisager, K., Forstner, O., Borge, M.J.G., Briz, J.A., Carmona-Gallardo, M., Fraile, L.M., Fynbo, H.O.U., Giles, T., Gottberg, A., Heinz, A., Johansen, J.G., Jonson, B., Kurcewicz, J., Lund, M.V., Nilsson, T., Nyman, G., Rapisarda, E., Steier, P., Tengblad, O., Thies, R., and Winkler, S.R.

Subjects
Nuclear Theory, Physics::Accelerator Physics, FOS: Physical sciences, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

We have observed beta-delayed proton emission from the neutron-rich nucleus 11Be by analysing a sample collected at the ISOLDE facility at CERN with accelerator mass spectrometry (AMS). With a branching ratio of (8.4 +- 0.6) 10^{-6} the strength of this decay mode, as measured by the B(GT)-value, is unexpectedly high. The result is discussed within a simple single-particle model and could be interpreted as a quasi-free decay of the 11Be halo neutron into a single-proton state., Comment: 6 pages, 2 figures

Published
2014
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48. First experiment with the NUSTAR/FAIR Decay Total Absorption γ-Ray Spectrometer (DTAS) at the IGISOL IV facility

Author

Guadilla, V., primary, Algora, A., additional, Tain, J.L., additional, Agramunt, J., additional, Äystö, J., additional, Briz, J.A., additional, Cano-Ott, D., additional, Cucoanes, A., additional, Eronen, T., additional, Estienne, M., additional, Fallot, M., additional, Fraile, L.M., additional, Ganioglu, E., additional, Gelletly, W., additional, Gorelov, D., additional, Hakala, J., additional, Jokinen, A., additional, Jordan, D., additional, Kankainen, A., additional, Kolhinen, V., additional, Koponen, J., additional, Lebois, M., additional, Martinez, T., additional, Monserrate, M., additional, Montaner-Pizá, A., additional, Moore, I., additional, Nácher, E., additional, Orrigo, S., additional, Penttilä, H., additional, Podolyak, Zs., additional, Pohjalainen, I., additional, Porta, A., additional, Regan, P., additional, Reinikainen, J., additional, Reponen, M., additional, Rinta-Antila, S., additional, Rubio, B., additional, Rytkönen, K., additional, Shiba, T., additional, Sonnenschein, V., additional, Sonzogni, A.A., additional, Valencia, E., additional, Vedia, V., additional, Voss, A., additional, Wilson, J.N., additional, and Zakari-Issoufou, A.-A., additional

Published
2016
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49. Total Absorption Spectroscopy of Fission Fragments Relevant for Reactor Antineutrino Spectra Determination

Author

Briz, J.A., primary, Zakari-Issoufou, A.-A., additional, Fallot, M., additional, Porta, A., additional, Algora, A., additional, Tain, J.L., additional, Valencia, E., additional, Rice, S., additional, Guadilla, V., additional, Agramunt, J., additional, Äystö, J., additional, Bowry, M., additional, Bui, V.M., additional, Caballero-Folch, R., additional, Cano-Ott, D., additional, Cormon, S., additional, Cucoanes, A., additional, Eloma, V., additional, Eronen, T., additional, Estévez, E., additional, Estienne, M., additional, Farrelly, G.F., additional, Fraile, L.M., additional, Ganioglu, E., additional, Garcia, A., additional, Gelletly, W., additional, Gomez-Hornillos, M.B., additional, Gorlychev, V., additional, Hakala, J., additional, Jokinen, A., additional, Jordan, M.D., additional, Kankainen, A., additional, Kondev, F.G., additional, Lebois, M., additional, Martinez, T., additional, Mendoza, E., additional, Molina, F., additional, Montaner, A., additional, Moore, I., additional, Nácher, E., additional, Orrigo, S., additional, Penttilä, H., additional, Pérez, A.B., additional, Podolyak, Zs., additional, Regan, P.H., additional, Rissanen, J., additional, Rubio, B., additional, Shiba, T., additional, Sonzogni, A., additional, Vedia, V., additional, Weber, C., additional, and Wilson, J., additional

Published
2016
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