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Production rates of long-lived radionuclides Be10 and Al26 under direct muon-induced spallation in granite quartz and its implications for past high-energy cosmic ray fluxes
/ Sakurai, H (Yamagata U.) ; Kurebayashi, Y (Yamagata U.) ; Suzuki, S (Yamagata U.) ; Horiuchi, K (Hirosaki U.) ; Takahashi, Y (Yamagata U.) ; Doshita, N (Yamagata U.) ; Kikuchi, S (Yamagata U.) ; Tokanai, F (Yamagata U.) ; Iwata, N (Yamagata U.) ; Tajima, Y (Yamagata U.) et al.
This study measured the Be10 and Al26 production cross sections of muon-induced long-lived radionuclides to investigate the long-term variations in high-energy cosmic ray muon yields and high-energy galactic cosmic rays over a few million years. We exposed targets consisting of synthetic silica plates and quartz samples in a 1-m-long granite core to a beam containing 8.79×1012 positive muons over ∼120 days with an energy of 160 GeV extracted at the COMPASS experiment line at CERN-SPS. [...]
2024 - 18 p.
- Published in : Phys. Rev. D 109 (2024) 102005
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2.
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3.
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High energy muon induced radioactive nuclides in nickel plate and its use for 2-D muon-beam image profile
/ Kurebayashi, Y (Yamagata U.) ; Sakurai, H (Yamagata U.) ; Takahashi, Y (Yamagata U.) ; Doshita, N (Yamagata U.) ; Kikuchi, S (Yamagata U.) ; Tokanai, F (Yamagata U.) ; Horiuchi, K (Hirosaki U.) ; Tajima, Y (Yamagata U.) ; Oe, T (Yamagata U.) ; Sato, T (Yamagata U.) et al.
Target materials were exposed to a muon beam with an energy of 160 GeV/c at the COMPASS experiment line in CERN-SPS to measure the production cross-sections for muon-induced radionuclides. A muon imager containing four nickel plates, each measuring 100 mm×100 mm, exposed to the IP plate successfully detected the muon beam image during an irradiation period of 33 days. [...]
ScienceDirect, 2015 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 799 (2015) 54-58
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4.
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First Ionization Potentials of Fm, Md, No, and Lr: Verification of Filling-Up of 5f Electrons and Confirmation of the Actinide Series
/ Sato, Tetsuya K (JAEA, Ibaraki) ; Asai, Masato (JAEA, Ibaraki) ; Borschevsky, Anastasia (Groningen U.) ; Beerwerth, Randolf (Jena U., TPI) ; Kaneya, Yusuke (JAEA, Ibaraki) ; Makii, Hiroyuki (JAEA, Ibaraki) ; Mitsukai, Akina (JAEA, Ibaraki) ; Nagame, Yuichiro (JAEA, Ibaraki) ; Osa, Akihiko (JAEA, Ibaraki) ; Toyoshima, Atsushi (JAEA, Ibaraki) et al.
We report the first ionization potentials (IP1) of the heavy actinides, fermium (Fm, atomic number Z = 100), mendelevium (Md, Z = 101), nobelium (No, Z = 102), and lawrencium (Lr, Z = 103), determined using a method based on a surface ionization process coupled to an online mass separation technique in an atom-at-a-time regime. The measured IP1 values agree well with those predicted by state-of-the-art relativistic calculations performed alongside the present measurements. [...]
2018 - 5 p.
- Published in : J. Am. Chem. Soc. 140 (2018) 14609-14613
Fulltext: PDF;
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5.
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Nuclear moments of the low-lying isomeric 1$^+$ state of $^{34}$Al: Investigation on the neutron 1$p$1$h$ excitation across $N=20$ in the island of inversion
/ Xu, Z Y (Leuven U.) ; Heylen, H (Leuven U. ; CERN ; Heidelberg, Max Planck Inst.) ; Asahi, K (Nishina Ctr., RIKEN ; Tokyo Inst. Tech.) ; Boulay, F (CEA DAM) ; Daugas, J M (CEA DAM) ; de Groote, R P (Leuven U.) ; Gins, W (Leuven U.) ; Kamalou, O (GANIL) ; Koszorús, Á (Leuven U.) ; Lykiardopoulou, M (Athens U.) et al.
The nuclear $g$ factor and quadrupole moment ($Q_s$) have been measured for the low-lying isomeric $1^+$ state of $^{34}$Al, using the $\beta$-detected nuclear magnetic resonance ($\beta$-NMR) and quadrupole resonance ($\beta$-NQR) methods. Spin-polarized $^{34}$Al isotopes were produced in a one-neutron pickup reaction induced by a $^{36}$S beam on a $^9$Be target at a kinetic energy of 77.5 MeV/nucleon, and were collected with the LISE fragment separator at GANIL. [...]
2018 - 8 p.
- Published in : Phys. Lett. B 782 (2018) 619-626
Article from SCOAP3: PDF;
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6.
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Characterization of the PTW 34031 ionization chamber (PMI) at RCNP with high energy neutrons ranging from 100 – 392 MeV
/ Theis, C (CERN) ; Carbonez, P (CERN) ; Feldbaumer, E (CERN) ; Forkel-Wirth, D (CERN) ; Jaegerhofer, L (CERN) ; Pangallo, M (CERN) ; Perrin, D (CERN) ; Urscheler, C (CERN) ; Roesler, S (CERN) ; H Vincke (CERN) et al.
Radiation monitoring at high energy proton accelerators poses a considerable challenge due to the complexity of the encountered stray radiation fields. These environments comprise a wide variety of different particle types and span from fractions of electron-volts up to several terra electron-volts. [...]
2017 - 5 p.
- Published in : EPJ Web Conf. 153 (2017) 08018
Fulltext: PDF;
In : 13th International Conference on Radiation Shielding & 19th Topical Meeting of the Radiation Protection & Shielding Division of the American Nuclear Society 2016, Paris, France, 3 - 6 Oct 2016, pp.08018
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7.
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First ionization potential of the heaviest actinide lawrencium, element 103
/ Sato, Tetsuya K (JAEA, Ibaraki) ; Asai, Masato (JAEA, Ibaraki) ; Borschevsky, Anastasia (Groningen U.) ; Stora, Thierry (CERN ; Gottingen U.) ; Sato, Nozomi (JAEA, Ibaraki) ; Kaneya, Yusuke (JAEA, Ibaraki ; Ibaraki U., Grad. Sch. Sci. Eng.) ; Tsukada, Kazuaki (JAEA, Ibaraki) ; Düllmann, Christoph E (Helmholtz Inst., Mainz ; Darmstadt, GSI ; Mainz U., Inst. Kernphys.) ; Eberhardt, Klaus (Helmholtz Inst., Mainz ; Mainz U., Inst. Kernphys.) ; Eliav, Ephraim (Tel Aviv U.) et al.
The first ionization potential (IP1) of element 103, lawrencium (Lr), has been successfully determined for the first time by using a newly developed method based on a surface ionization process. The measured IP1 value is 4.9630.080.07 eV. [...]
2016 - 6 p.
- Published in : EPJ Web Conf. 131 (2016) 05001
Fulltext: PDF;
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8.
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A new search for the $K_{L} \to \pi^0 \nu \overline{\nu}$ and $K_{L} \to \pi^{0} X^{0}$ decays
/ Ahn, J.K. (Pusan Natl. U.) ; Baek, K.Y. (Pusan Natl. U.) ; Banno, S. (Osaka U.) ; Beckford, B. (Tohoku U.) ; Brubaker, B. (Yale U.) ; Cai, T. (Rochester U.) ; Campbell, M. (CERN) ; Carruth, C. ; Chen, S.H. ; Chu, S. (Stanford U., Phys. Dept.) et al.
We searched for the $CP$-violating rare decay of neutral kaon, $K_{L} \to \pi^0 \nu \overline{\nu}$, in data from the first 100 hours of physics running in 2013 of the J-PARC KOTO experiment. One candidate event was observed while $0.34\pm0.16$ background events were expected. [...]
arXiv:1609.03637.-
2017 - 11 p.
- Published in : Prog. Theor. Exp. Phys. 2017 (2017) 021C01
Article from SCOAP3: PDF; Fulltext: PDF; External link: Preprint
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9.
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Development of a He/CdI$_2$ gas-jet system coupled to a surface-ionization type ion-source in JAEA-ISOL: towards determination of the first ionization potential of Lr (Z = 103)
/ Sato, T K (JAEA, Ibaraki) ; Asai, M (JAEA, Ibaraki) ; Sato, N (JAEA, Ibaraki) ; Tsukada, K (JAEA, Ibaraki) ; Toyoshima, A (JAEA, Ibaraki) ; Ooe, K (Niigata U. (main)) ; Miyashita, S (Hiroshima U. (main)) ; Kaneya, Y (JAEA, Ibaraki ; Ibaraki U., Grad. Sch. Sci. Eng.) ; Osa, A (JAEA, Ibaraki) ; Schädel, M (JAEA, Ibaraki) et al.
We report on development of a gas-jet transport system coupled to a surface ionization ion-source in the JAEA-ISOL (Isotope Separator On-Line) system. As a new aerosol material for the gas-jet system, CdI2, which has a low boiling point of 713 °C, is exploited to prevent deposition of the aerosol material on the surface of the ion-source. [...]
2015
- Published in : J. Radioanal. Nucl. Chem. 303 (2015) 1253-1257
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10.
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Revision of JAERI-QMD for analysis of peripheral nucleus-nucleus collisions
/ Ogawa, T (Japan Atomic Energy Agency) ; Sato, T (Japan Atomic Energy Agency) ; Hashimoto, S (Japan Atomic Energy Agency) ; Niita, K (Japan Atomic Energy Agency)
Geneva : CERN, 2015
Published version from CERN: PDF;
In : 14th International Conference on Nuclear Reaction Mechanisms, Villa Monastero, Varenna, Italy, 15 - 19 Jun 2015, pp.301
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