Refine your search:     
Report No.
 - 
Search Results: Records 1-10 displayed on this page of 10
  • 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

Unexpectedly enhanced $$alpha$$-particle preformation in $$^{48}$$Ti probed by the ($$p$$,$$palpha$$) reaction

Taniguchi, Yasutaka*; Yoshida, Kazuki; Chiba, Yohei*; Kanada-En'yo, Yoshiko*; Kimura, Masaaki*; Ogata, Kazuyuki*

Physical Review C, 103(3), p.L031305_1 - L031305_5, 2021/03

 Times Cited Count:2 Percentile:90.09(Physics, Nuclear)

Based on the $$^{48}$$Ti($$p$$,$$palpha$$)$$^{44}$$Ca reaction analysis, this study reports that $$alpha$$-particle formation in the medium-mass $$^{48}$$Ti nucleus is pronounced more compared to that expected through mean-field approximations. Moreover, the estimated average distance between the $$alpha$$ particle and residue equals approximately 4.5 fm. This result poses a challenge to describe the four nucleon correlations using microscopic nuclear models.

Journal Articles

Quantitative description of the $$^{20}$$Ne($$p$$,$$palpha$$)$$^{16}$$O reaction as a means of probing the surface $$alpha$$ amplitude

Yoshida, Kazuki; Chiba, Yohei*; Kimura, Masaaki*; Taniguchi, Yasutaka*; En'yo, Yoshiko*; Ogata, Kazuyuki*

Physical Review C, 100(4), p.044601_1 - 044601_6, 2019/10

 Times Cited Count:6 Percentile:76.03(Physics, Nuclear)

The proton-induced $$alpha$$ knockout reaction is one of the reaction probes for the $$alpha$$ clustering. However, it was reported that the theoretical description of the reaction cannot reproduce experimental data. In this work, we describe the $$^{20}$$Ne($$p$$,$$palpha$$)$$^{16}$$O reaction within the distorted wave impulse approximation with a $$alpha$$-$$^{16}$$O cluster wave function constructed by the antisymmetrized molecular dynamics. We show that the $$^{20}$$Ne($$p$$,$$palpha$$)$$^{16}$$O cross section is quantitatively well reproduced by the present framework without any adjustable parameters. This success demonstrates that the proton-induced $$alpha$$ knockout reaction is a quantitative probe for the $$alpha$$ clustering.

Journal Articles

Direct probing of the cluster structure in $$^{12}$$Be via the $$alpha$$-knockout reaction

Lyu, M.*; Yoshida, Kazuki; En'yo, Yoshiko*; Ogata, Kazuyuki*

Physical Review C, 99(6), p.064610_1 - 064610_9, 2019/06

 Times Cited Count:3 Percentile:52.47(Physics, Nuclear)

Our objective is to provide direct probing of the $$alpha$$-cluster formation in the $$^{12}$$Be target through associating the structure information obtained by a microscopic theory with the experimental observables of $$alpha$$-knockout reactions. We formulate a new wave function of the Tohsaki-Horiuchi-Schuck-R$"o$pke type for the structure of $$^{12}$$Be and adopt it to the distorted wave impulse approximation framework for the knockout reaction calculation. We reproduced the low-lying spectrum of $$^{12}$$Be, and the knockout cross section is theoretically predicted.

Journal Articles

Investigation of $$alpha$$ clustering with knockout reactions

Yoshida, Kazuki; Ogata, Kazuyuki*; Kanada-En'yo, Yoshiko*

Physical Review C, 98(2), p.024614_1 - 024614_6, 2018/08

 Times Cited Count:10 Percentile:79.4(Physics, Nuclear)

In $$alpha$$ clustering studies, it is very important to probe the $$alpha$$ cluster amplitude at nuclear surface since $$alpha$$ spectroscopic factor is not necessarily a direct measure of the $$alpha$$ clustering. We consider $$^{20}$$Ne($$p$$,$$palpha$$)$$^{16}$$O and $$^{120}$$Sn($$p$$,$$palpha$$)$$^{116}$$Cd at 100 - 400 MeV within the distorted wave impulse approximation (DWIA) framework. We introduce a $textit{masking function}$ which shows how the reaction amplitude in the nuclear interior is suppressed and defines the probed region of the $$alpha$$ cluster wave function. It is clearly shown by means of the masking function that thanks to the absorption of distorting potentials, the $$alpha$$ knockout reaction probes the $$alpha$$ cluster amplitude in the nuclear surface region, which is the direct measure of well-developed $$alpha$$ cluster states.

Journal Articles

Probing surface distributions of $$alpha$$ clusters in $$^{20}$$Ne via $$alpha$$-transfer reaction

Fukui, Tokuro; Taniguchi, Yasutaka*; Suhara, Tadahiro*; Kanada-En'yo, Yoshiko*; Ogata, Kazuyuki*

Journal of Physics; Conference Series, 863(1), p.012036_1 - 012036_3, 2017/07

 Times Cited Count:0 Percentile:0.08

Journal Articles

Probing surface distributions of $$alpha$$ clusters in $$^{20}$$Ne via $$alpha$$-transfer reaction

Fukui, Tokuro; Taniguchi, Yasutaka*; Suhara, Tadahiro*; Kanada-En'yo, Yoshiko*; Ogata, Kazuyuki*

Physical Review C, 93(3), p.034606_1 - 034606_9, 2016/03

AA2015-0612.pdf:0.54MB

 Times Cited Count:13 Percentile:75.95(Physics, Nuclear)

Oral presentation

Probing $$alpha$$-cluster distribution via $$alpha$$-transfer reaction

Fukui, Tokuro; Taniguchi, Yasutaka*; Suhara, Tadahiro*; Kanada-En'yo, Yoshiko*; Ogata, Kazuyuki*

no journal, , 

no abstracts in English

Oral presentation

Description of transfer reactions with coupled-channels Born approximation

Fukui, Tokuro; Kanada-En'yo, Yoshiko*; Kikuchi, Yuma*; Matsumoto, Takuma*; Ogata, Kazuyuki*; Suhara, Tadahiro*; Taniguchi, Yasutaka*; Yahiro, Masanobu*

no journal, , 

Oral presentation

Investigation on alpha clustering via knockout reaction

Yoshida, Kazuki; Ogata, Kazuyuki*; Kanada-En'yo, Yoshiko*

no journal, , 

The alpha clustering has been one of the main interest in nuclear physics. In order to probe the alpha clustering through reaction observables, the proton-induced alpha knockout reaction, (p,p alpha), is considered in this study. The purpose of this work is to reveal how the alpha cluster amplitude is probed through the (p,p alpha) reactions. Within the distorted wave impulse approximation (DWIA) framework, We have newly introduced the "masking function" which defines the probed region of the alpha cluster amplitude through the (p,p alpha) reactions. It has been clearly shown by means of the masking function that the alpha knockout reaction probes the alpha cluster in the nuclear surface, which will be the direct measure of well-developed alpha cluster states. A simplified form of the masking function is also introduced and the incident energy dependence of the masking effect is investigated. As a conclusion, alpha knockout reaction can be the probe for the alpha cluster amplitude in the nuclear surface owing to the masking effect originated from the absorption of distorting potentials, and is a suitable method to investigate how alpha cluster states are spatially developed.

Oral presentation

Alpha knockout reaction analysis with AMD cluster wave function

Yoshida, Kazuki; Taniguchi, Yasutaka*; Chiba, Yohei*; Kimura, Masaaki*; En'yo, Yoshiko*; Ogata, Kazuyuki*

no journal, , 

In this presentation I will discuss the investigation on $$alpha$$ cluster states through $$alpha$$ knockout reaction cross section analyses, $$^{20}$$Ne and $$^{48}$$Ti in particular. The $$alpha$$ cluster states of these nuclei are described by the Antisymmetrized Molecular Dynamics (AMD), and the Distorted Wave Impulse Approximation (DWIA) is adopted as a reaction theory. Within the framework of these structure and reaction theories, the theoretical knockout reaction cross section is calculated and the comparison between existing data is discussed.

10 (Records 1-10 displayed on this page)
  • 1