JAEA
  • help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Search Results: Records 1-5 displayed on this page of 5
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Measurement of the angular distribution of $$gamma$$-rays after neutron capture by $$^{139}$$La for a T-violation search

Okudaira, Takuya; Shimizu, Hirohiko*; Kitaguchi, Masaaki*; Hirota, Katsuya*; Haddock, C. C.*; Ito, Ikuya*; Yamamoto, Tomoki*; Endo, Shunsuke*; Ishizaki, Kohei*; Sato, Takumi*; et al.

EPJ Web of Conferences, 219, p.09001_1 - 09001_6, 2019/12

https://doi.org/10.1051/epjconf/201921909001

Parity violating effects enhanced by up to 10$$^6$$ times have been observed in several neutron induced compound nuclei. There is a theoretical prediction that time reversal (T) violating effects can also be enhanced in these nuclei implying that T-violation can be searched for by making very sensitive measurements. However, the enhancement factor has not yet been measured in all nuclei. The angular distribution of the (n,$$gamma$$) reaction was measured with $$^{139}$$La by using a germanium detector assembly at J-PARC, and the enhancement factor was obtained. From the result, the measurement time to achieve the most sensitive T-violation search was estimated as 1.4 days, and a 40% polarized $$^{139}$$La target and a 70% polarized $$^3$$He spin filter whose thickness is 70 atm$$cdot$$cm are needed. Therefore high quality $$^3$$He spin filter is developed in JAEA. The measurement result of the (n,$$gamma$$) reaction at J-PARC and the development status of the $$^3$$He spin filter will be presented.

Journal Articles

Nuclear moments of the low-lying isomeric $$1^+$$ state of $$^{34}$$Al; Investigation on the neutron $$1p1h$$ excitation across $$N=20$$ in the island of inversion

Xu, Z. Y.*; Heylen, H.*; Asahi, Koichiro*; Boulay, F.*; Daugas, J. M.*; de Groote, R. P.*; Gins, W.*; Kamalou, O.*; Koszor$'u$s, $'A$.*; Lykiardopoupou, M.*; et al.

Physics Letters B, 782, p.619 - 626, 2018/07

AA2018-0159.pdf:0.5MB

https://doi.org/10.1016/j.physletb.2018.06.009
 Times Cited Count：8 Percentile：51.53(Astronomy & Astrophysics)

no abstracts in English

Journal Articles

Erosion of $$N$$=20 shell in $$^{33}$$Al investigated through the ground-state electric quadrupole moment

Shimada, Kenji*; Ueno, Hideki*; Neyens, G.*; Asahi, Koichiro*; Balabanski, D. L.*; Daugas, J. M.*; Depuydt, M.*; De Rydt, M.*; Gaudefroy, L.*; Gr$'e$vy, S.*; et al.

Physics Letters B, 714(2-5), p.246 - 250, 2012/08

https://doi.org/10.1016/j.physletb.2012.07.030
 Times Cited Count：7 Percentile：39.52(Astronomy & Astrophysics)

no abstracts in English

Journal Articles

Precision measurement of the electric quadrupole moment of $$^{31}$$Al and determination of the effective proton charge in the sd-shell

De Rydt, M.*; Neyens, G.*; Asahi, Koichiro*; Balabanski, D. L.*; Daugas, J. M.*; Depuydt, M.*; Gaudefroy, L.*; Gr$'e$vy, S.*; Hasama, Yuka*; Ichikawa, Yuichi*; et al.

Physics Letters B, 678(4), p.344 - 349, 2009/07

https://doi.org/10.1016/j.physletb.2009.06.043
 Times Cited Count：18 Percentile：70.04(Astronomy & Astrophysics)

no abstracts in English

Oral presentation

Electric quadrupole moment measurement using a new RF-application system

Nagae, Daisuke; Takemuara, Makoto*; Ueno, Hideki*; Kameda, Daisuke*; Asahi, Koichiro*; Yoshimi, Akihiro*; Sugimoto, Takashi*; Nagatomo, Takashi*; Kobayashi, Yoshio*; Uchida, Makoto*; et al.

no journal, , 

An electric quadrupole moment ($$Q$$ moment) is sensitive to collective aspects of nuclear structure. In the $$Q$$-moment measurement for unstable nuclei, we employ the $$beta$$-detected nuclear-quadrupole resonance method. In this method, we need to supply $$2I$$ resonance frequencies, where $$I$$ denotes the nuclear spin. We have developed a new RF-application system to induced all of the $$2I$$ transitions. The application of the $$2I$$ frequencies may be pursued in two different ways; the sequential RF pulse method and the mixed-wave RF pulse method. We confirmed the reversal of polarization for the both methods, from measurements of $$beta$$-ray asymmetry change for polarized $$^{12}$$B. Using this system, the $$Q$$ moments of $$^{31,32}$$Al have been measured to be $$|Q(^{31}{rm Al})| = 104(9)$$ $$e$$$$cdot$$mb and $$|Q(^{32}{rm Al})| = 24(2)$$ $$e$$$$cdot$$mb by the sequential RF pulse method.

5 (Records 1-5 displayed on this page)
  • 1