First results from the HENSA/ANAIS collaboration at the Canfranc Underground Laboratory

The HENSA/ANAIS collaboration aims for the precise determination of the neutron flux that could affect ANAIS-112, an experiment looking for the dark matter annual modulation using NaI(Tl) scintillators. In this work, the first measurements of the neutron flux and Monte Carlo simulations of the neutron spectrum are reported.Peer ReviewedPostprint (published version

miniBELEN: a modular neutron counter for (a, n) reactions

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 (a, 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(a, n) 30P reaction is also presented.This work has been supported by the Spanish Ministerio de Economía y Competitividad under grants FPA2017-83946- C2-1 & C2-2 and PID2019-104714GB-C21 & C22, the Generalitat Valenciana Grant PROMETEO/2019/007, both cofounded by FEDER (EU), and the SANDA project funded under H2020-EURATOM-1.1 Grant No. 847552. The authors acknowledge the support from Centro de Microanálisis de Materiales (CMAM) - Universidad Autónoma de Madrid, for the beam time proposal (Comissioning of neutron detector systems for (a,݊n) reaction measurements) with code P01156, and its technical staff for their contribution to the operation of the accelerator.Article signat per 41 autors/es: N. Mont-Geli, A. Tarifeño-Saldivia, L.M. Fraile, S. Viñals, A. Perea, M. Pallàs, G. Cortés, E. Nácher, J.L. Tain, V. Alcayne, A. Algora, J. Balibrea-Correa, J. Benito, M.J.G. Borge, J.A. Briz, F. Calviño, D. Cano-Ott, A. De Blas, C. Domingo-Pardo, B. Fernández, R. Garcia, G. García, J. Gómez-Camacho, E.M. González-Romero, C. Guerrero, J. Lerendegui-Marco, M. Llanos, T. Martínez, E. Mendoza, J.R. Murias, S.E.A. Orrigo, A. Pérez de Rada, V. Pesudo, J. Plaza, J.M. Quesada, A. Sánchez, V. Sánchez-Tembleque, R. Santorelli, O. Tengblad, J.M. Udías and D. Villamarín.Postprint (published version

Estudi de les propietats de desintegració de nuclis del Ba a Nd (A~160) rellevants per a la formació del pic de terres rares del procés r

Half-lifes (T1/2) of exotic neutron-rich isotopes of Ba, La, Ce, Pr, and Nd were measured at the RIKEN Nishina Center. The experimental setup consisted of the BigRIPS in-flight separator for ion selection identification, the Advance Implantation Detector Array (AIDA) for ions and ß detection, and the BRIKEN detector for neutron counting. Using this setup, 4 new T1/2 have been measured for the first time, and 38 T1/2 have been remeasured with improved precision in several cases. These new experimental data should help to constrain theoretical models for calculations of T1/2. The status of the experimental analysis and preliminary results are provided in this contribution.This work has been supported by the Spanish Ministerio de Economía y Competitividad under Grants. FPA2014- 52823-C2-1-P, FPA2014-52823-C2-2-P, FPA2017-83946- C2-1-P, FPA2017-83946-C2-2-P and grants from Ministerio de Ciencia e Innovacion PID2019-104714GB-C21, PID2019-104714GB-C22. Supported by Generalitat Valenciana regional grant PROMETEO/2019/007. Supported by European Union FEDER funds. It also has been supported by NKFIH (NN128072).Article signat per 61 autors/es: M. Pallàs, A. Tarifeño-Saldivia, G. G. Kiss, J. L. Tain, A. Tolosa-Delgado, A. Vitéz- Sveiczer, F. Calviño, J. Agramunt, P. Aguilera, A. Algora, J. M. Allmond, H. Baba, N. T. Brewer, R. Caballero-Folch, P. J. Coleman-Smith, G. Cortes, T. Davinson, I. Dillmann, C. Domingo-Pardo, A. Estrade, N. Fukuda, S. Go, C. J. Griffin, R. K. Grzywacz, O. Hall, L. J. Harkness-Brennan, T. Isobe, D. Kahl, T. T. King, A. Korgul, S. Kovács, S. Kubono, M. Labiche, J. Liu, M. Madurga, K. Miernik, F. Molina, N. Mont-Geli, A. I. Morales, E. Nácher, A. Navarro, N. Nepal, S. Nishimura, M. Piersa-Silkowska, V. Phong, B. C. Rasco, J. Romero-Barrientos, B. Rubio, K. P. Rykaczewski, Y. Saito, H. Sakurai, Y. Shimizu, M. Singh, T. Sumikama, H. Suzuki, T. N. Szegedi, H. Takeda, K. Wang, M. Woli´nska-Cichocka, P. J. Woods, and R. Yokoyama for the BRIKEN collaboration.Postprint (published version

Estudi de les propietats de desintegració de nuclis del Ba a Nd rellevants per a la formació del pic de les terres rares del procés r (A~160)

At the RIKEN Nishina Center, exotic neutron-rich isotopes of Ba, La, Ce, Pr, and Nd were measured. This work reports their half-lives (T1/2) and ß-delayed neutron-emission probabilities (Pxn). The setup consisted of the BigRIPS in-flight separator for particle identification, the Advanced Implanta- tion Detector Array (AIDA) for ions and ß detection, and the BRIKEN neutron counter for neutron detection. Using this arrangement, 4 new T1/2 and 14 new P1n were measured. Furthermore, 38 T1/2 and 2 P1n values were remeasured, decreasing the uncertainties for some of them. In addition to improving predic- tions of nucleosynthesis models that describe the production of the rare-earth peak at A~160 via the r-process, these additional experimental data should help to constrain theoretical models for calculations of T1/2 and Pxn in this region.This work has been supported by the Spanish Ministerio de Economía y Competitividad un- der Grants nos. FPA2014-52823-C2-1-P, FPA2014-52823-C2-2-P, FPA2017-83946-C2-1-P, FPA2017-83946-C2-2-P and grants from Ministerio de Ciencia e Innovacion nos PID2019- 104714GB-C21, PID2019-104714GB-C22. It was also supported by NKFIH (NN128072) and by the ÚNKP-22-2 and ÚNKP-22-3 New National Excellence Program of the Ministry for Culture and Innovation from the source of the National Research, Development and In- novation Fund (Project numbers: ÚNKP-22-2-I-DE-75; ÚNKP-22-3-II- DE-132).Article signat per 61 autors/es: M. Pallàs, A. Tarifeño-Saldivia, G. G. Kiss, J. L. Tain, A. Tolosa- Delgado, A. Vitéz-Sveiczer, F. Calviño, J. Agramunt, P. Aguilera, A. Algora, J. M. Allmond, H. Baba, N. T. Brewer, R. Caballero-Folch, P. J. Coleman-Smith, G. Cortes, T. Davinson, I. Dillmann, C. Domingo-Pardo, A. Estrade, N. Fukuda, S. Go, C. J. Griffin, R. K. Grzywacz, O. Hall, L. J. Harkness-Brennan, T. Isobe, D. Kahl, T. T. King, A. Korgul, S. Kovács, S. Kubono, M. Labiche, J. Liu, M. Madurga, K. Miernik, F. Molina, N. Mont-Geli, A. I. Morales, E. Nácher, A. Navarro, N. Nepal, S. Nishimura, M. Piersa- Silkowska, V. Phong, B. C. Rasco, J. Romero-Barrientos, B. Rubio, K. P. Rykaczewski, Y. Saito, H. Sakurai, Y. Shimizu, M. Singh, T. Sumikama, H. Suzuki, T. N. Szegedi, H. Takeda, K. Wang, M. Woli´nska-Cichocka, P. J. Woods, and R. Yokoyama for the BRIKEN collaboration.Postprint (published version

The DESPEC setup for GSI and FAIR

The DEcay SPECtroscopy (DESPEC) setup for nuclear structure investigations was developed and commissioned at GSI, Germany in preparation for a full campaign of experiments at the FRS and Super-FRS. In this paper, we report on the first employment of the setup in the hybrid configuration with the AIDA implanter coupled to the FATIMA LaBr3(Ce) fast-timing array, and high-purity germanium detectors. Initial results are shown from the first experiments carried out with the setup. An overview of the setup and function is discussed, including technical advancements along the path.Peer ReviewedArticle signat per 169 autors/es. A.K. Mistry 1,2,∗, H.M. Albers 2, T. Arıcı 3, A. Banerjee 2, G. Benzoni 4, B. Cederwall 5, J. Gerl 2, M. Górska 2, O. Hall 6, N. Hubbard 1,2, I. Kojouharov 2, J. Jolie 7, T. Martinez 8, Zs. Podolyák 9, P.H. Regan 9,10, J.L. Tain 11, A. Tarifeno-Saldivia 12, H. Schaffner 2, V. Werner 1, G. Ağgez 3, J. Agramunt 11, U. Ahmed 1, O. Aktas 5, V. Alcayne 8, A. Algora 11,13, S. Alhomaidhi 1,2, F. Amjad 2, C. Appleton 6, M. Armstrong 7, M. Balogh 14, K. Banerjee 15, P. Bednarczyk 16, J. Benito 17, C. Bhattacharya 15, P. Black 6, A. Blazhev 7, S. Bottoni 4,18, P. Boutachkov 2, A. Bracco 18,4, A.M. Bruce 19, M. Brunet 9, C.G. Bruno 6, I. Burrows 20, F. Calvino 12, R.L. Canavan 9,10, D. Cano-Ott 8, M.M.R. Chishti 9, P. Coleman-Smith 20, M.L. Cortés 1, G. Cortes 12, F. Crespi 18,4, B. Das 5, T. Davinson 6, A. De Blas 12, T. Dickel 2, M. Doncel 21, A. Ertoprak 5,3, A. Esmaylzadeh 7, B. Fornal 16, L.M. Fraile 17, F. Galtarossa 14, A. Gottardo 14, V. Guadilla 11,22, J. Ha 23,24, E. Haettner 2, G. Häfner 25,7, H. Heggen 2, P. Herrmann 1, C. Hornung 2, S. Jazrawi 9,10, P.R. John 1, A. Jokinen 26, C.E. Jones 19, D. Kahl 6,27, V. Karayonchev 7, E. Kazantseva 2, R. Kern 1, L. Knafla 7, R. Knöbel 2, P. Koseoglou 1, G. Kosir 28, D. Kostyleva 2, N. Kurz 2, N. Kuzminchuk 2, M. Labiche 20, J. Lawson 20, I. Lazarus 20, S.M. Lenzi 23, S. Leoni 4,18, M. Llanos-Expósito 17, R. Lozeva 25, A. Maj 16, J.K. Meena 15, E. Mendoza 8, R. Menegazzo 24, D. Mengoni 14, T.J. Mertzimekis 29, M. Mikolajczuk 22,2, B. Million 4, N. Mont-Geli 12, A.I. Morales 11, P. Morral 20, I. Mukha 2, J.R. Murias 17, E. Nacher 11, P. Napiralla 1, D.R. Napoli 14, B.S. Nara-Singh 30, D. O’Donnell 30, S.E.A. Orrigo 11, R.D. Page 31, R. Palit 32, M. Pallas 12, J. Pellumaj 14, S. Pelonis 29, H. Pentilla 26, A. Pérez de Rada 8, R.M. Pérez-Vidal 14, C.M. Petrache 25, N. Pietralla 1, S. Pietri 2, S. Pigliapoco 24, J. Plaza 8, M. Polettini 4,18, C. Porzio 4,18, V.F.E. Pucknell 20, F. Recchia 23, P. Reiter 7, K. Rezynkina 24, S. Rinta-Antila 26, E. Rocco 2, H.A. Rösch 2,1, P. Roy 15,2, B. Rubio 11, M. Rudigier 1, P. Ruotsalainen 26, S. Saha 33, E. Şahin 1,2, Ch. Scheidenberger 2, D.A. Seddon 31, L. Sexton 6, A. Sharma 34, M. Si 25, J. Simpson 20, A. Smith 35, R. Smith 20, P.A. Söderström 27, A. Sood 5, A. Soylu 36, Y.K. Tanaka 37, J.J. Valiente-Dobón 14, P. Vasileiou 29, J. Vasiljevic 5, J. Vesic 28, D. Villamarin 8, H. Weick 2, M. Wiebusch 2, J. Wiederhold 1, O. Wieland 4, H.J. Wollersheim 2, P.J. Woods 6, A. Yaneva 7, I. Zanon 14, G. Zhang 23,24, J. Zhao 2,38, R. Zidarova 1, G. Zimba 26, A. Zyriliou 29Postprint (author's final draft