☆ 4.5 Article

Collectivity evolution in the neutron-rich Pd isotopes toward the N=82 shell closure

PHYSICAL REVIEW C (2013)

Journal

PHYSICAL REVIEW C

Volume 88, Issue 5, Pages -

Publisher

AMER PHYSICAL SOC

DOI: 10.1103/PhysRevC.88.054318

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Physics, Nuclear

Funding

OTKA [K100835, NN104543]
Grants-in-Aid for Scientific Research [24105005, 24740154] Funding Source: KAKEN

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Abstract

The neutron-rich, even-even Pd-122,Pd-124,Pd-126 isotopes were studied via in-beam gamma-ray spectroscopy at the RIKEN Radioactive Isotope Beam Factory. Excited states at 499(9), 590(11), and 686(17) keV were found in the three isotopes, which we assign to the respective 2(1)(+) -> 0(gs)(+) decays. In addition, candidates for the 4(1)(+) states at 1164(20) and 1300(22) keV were observed in Pd-122 and Pd-124, respectively. The resulting E-x(2(1)(+)) systematics are similar to the Xe (Z = 54) isotopic chain and theoretical predictions by the proton-neutron interacting boson model (IBM-2), indicating the magic nature of N = 82 in the Pd isotopes.

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Silicon tracker for cluster-knockout reactions at intermediate energies

K. Higuchi, J. Tanaka, R. Tsuji, M. Boehmer, R. Gernhaeuser, S. Kawase, J. Zenihiro, Y. Hijikata, R. Matsumura, K. Yahiro, S. Takeshige, H. Baba, E. Takada, T. Uesaka

Summary: The ONOKORO project aims to uncover the formation mechanism of clusters in atomic nuclei and is developing a new detector array for measuring energies and angles of light ions emitted in the reactions. The silicon tracker shows good resolution in tracking particles with regards to angular and energy-loss. Performance tests on prototype silicon detectors with 100 μm thickness and strip width were conducted, producing energy-loss spectra with a good signal-to-noise ratio. The detectors have optimized dynamic ranges to detect Z = 1 and Z = 2 ions emitted in cluster-knockout reactions.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS (2023)

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Article Instruments & Instrumentation

Designing TOGAXSI: Telescope for inverse-kinematics cluster-knockout reactions

J. Tanaka, R. Tsuji, K. Higuchi, H. Baba, M. Boehmer, T. Furuno, R. Gernhaeuser, Y. Hijikata, S. Ishimoto, T. Kawabata, S. Kawase, Y. Kubota, S. Kurosawa, S. Takeshige, T. Uesaka, K. Yahiro, J. Zenihiro

Summary: We have launched a new research project, ONOKORO, to study the formation mechanism of clusters in atomic nuclei. The project investigates clustering phenomena in the medium-to-heavy mass region using inverse-kinematics cluster-knockout reactions. A new detector array, TOGAXSI, is being constructed for this purpose. It measures scattering angles, energies of emitted particles, and recoil protons to achieve high-resolution cluster separation.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS (2023)

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Article Instruments & Instrumentation

Development of a gaseous Xe scintillator for particle identification of high-intensity and heavy ion beams

Y. Hijikata, J. Zenihiro, H. Baba, M. Dozono, S. Enyo, N. Fukuda, T. Harada, Y. Matsuda, S. Michimasa, D. Nishimura, S. Nishimura, S. Ota, Y. Shimizu, H. Sakaguchi, S. Sugawara, H. Suzuki, H. Takahashi, H. Takeda, S. Takeshige, J. Tanaka, S. Terashima, R. Tsuji, T. Uesaka, K. Yoshida

Summary: We have developed a gaseous Xe scintillator as a new AE detector with high radiation hardness and fast response. In this study, we tested the performance of the detector in RIBF, and found that it has an rms resolution of about 0.2 for Z=35 and 0.3 for Z=55. Additionally, it exhibits a good timing resolution of 74.4(6) ps in rms for a 238U beam.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS (2023)

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Proceedings Paper Physics, Multidisciplinary

EXPERIMENTAL LEVEL SCHEME OF 78Cu

L. G. Pedersen, E. Sahin, A. Gorgen, F. L. Bello Garrote, Y. Tsunoda, T. Otsuka, M. Niikura, S. Nishimura, Z. Xu, H. Baba, G. Benzoni, F. Browne, A. M. Bruce, S. Ceruti, F. C. L. Crespi, R. Daido, G. de Angelis, M. -C. Delattre, Zs Dombradi, P. Doornenbal, Y. Fang, S. Franchoo, G. Gey, A. Gottardo, T. Isobe, P. R. John, H. S. Jung, I. Kojouharov, T. Kubo, N. Kurz, I. Kuti, Z. Li, G. Lorusso, I. Matea, K. Matsui, D. Mengoni, T. Miyazaki, V. Modamio, S. Momiyama, A. I. Morales, P. Morfouace, D. R. Napoli, F. Naqvi, H. Nishibata, A. Odahara, R. Orlandi, Z. Patel, S. Rice, H. Sakurai, H. Schaffner, L. Sinclair, P. -A. Soderstrom, D. Sohler, I. G. Stefan, T. Sumikama, D. Suzuki, R. Taniuchi, J. Taprogge, Z. Vajta, J. J. Valiente-Dobon, H. Watanabe, V. Werner, J. Wu, A. Yagi, M. Yalcinkaya, R. Yokoyama, K. Yoshinaga

Summary: Excited states in Cu-78 were observed for the first time following the ss decay of Ni-78 created by in-flight fission of U-238. A level scheme comprising eight excited states with tentative spin assignments for 5 of them was constructed based on the coincidence relationships between the observed gamma-ray transitions. In addition, an isomeric state with a lifetime of 3.8(4) ms was found to decay by internal conversion.

ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT (2023)

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Correction Multidisciplinary Sciences

First observation of 28O (vol 620, pg 965, 2023)

Y. Kondo, N. L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, F. Delaunay, A. Delbart, Q. Deshayes, Zs. Dombradi, C. A. Douma, A. Ekstroem, Z. Elekes, C. Forssen, I. Gasparic, J. -m. Gheller, J. Gibelin, A. Gillibert, G. Hagen, M. N. Harakeh, A. Hirayama, C. R. Hoffman, M. Holl, A. Horvat, A. Horvath, J. W. Hwang, T. Isobe, W. G. Jiang, J. Kahlbow, N. Kalantar-Nayestanaki, S. Kawase, S. Kim, K. Kisamori, T. Kobayashi, D. Koerper, S. Koyama, I. Kuti, V. Lapoux, S. Lindberg, F. M. Marques, S. Masuoka, J. Mayer, K. Miki, T. Murakami, M. Najafi, T. Nakamura, K. Nakano, N. Nakatsuka, T. Nilsson, A. Obertelli, K. Ogata, F. de Oliveira Santos, N. A. Orr, H. Otsu, T. Otsuka, T. Ozaki, V. Panin, T. Papenbrock, S. Paschalis, A. Revel, D. Rossi, A. T. Saito, T. Y. Saito, M. Sasano, H. Sato, Y. Satou, H. Scheit, F. Schindler, P. Schrock, M. Shikata, N. Shimizu, Y. Shimizu, H. Simon, D. Sohler, O. Sorlin, L. Stuhl, Z. H. Sun, S. Takeuchi, M. Tanaka, M. Thoennessen, H. Toernqvist, Y. Togano, T. Tomai, J. Tscheuschner, J. Tsubota, N. Tsunoda, T. Uesaka, Y. Utsuno, I. Vernon, H. Wang, Z. Yang, M. Yasuda, K. Yoneda, S. Yoshida

NATURE (2023)

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