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Elastic Scattering of 120-MeV Alpha Particles by 28Si
Young Kwan Kwon,이춘식,Shigeru Kubono 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.5
The angular distributions of the elastic scattering of $\alpha$ particles by $^{28}$Si have been measured at an incident energy of 120 MeV throughout the angular range of $\theta_{c.m.}$ = 9.17$^{\circ}$ to 54.27$^{\circ}$. Elastic cross sections have been analyzed in terms of an optical model by using a six-parameter volume-type Woods-Saxon potential. Optical potential parameters have been obtained by using the ${\chi}^2$ minimization method to compare calculations to experiments. We have verified various possibilities of potential ambiguities by using a reduced-parameter fit and a systematic grid search. Consequently, we have obtained three different optical potential parameter sets for the $^{28}$Si + $\alpha$ reaction channel.
Development and Performance Test of the Analysis Software for the CRIB Active Target
이필수,이춘식,문준영,채경육,차수미,Hidetoshi Yamaguchi,Taro Nakao,David M. Kahl,Shigeru Kubono,Silvio Cherubini,Seiya Hayakawa,Cosimo Signorini 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.3
Software for genuinely event-by-event analysis and event reconstruction of data obtained by usingan active target has been developed in the graphical user interface under the CERN ROOT framework. The primary motivation for developing the software was to provide physicists who performexperiments using an active target a more user-friendly environment for the purpose of investigatingthe performance of detection systems and obtaining ideas about physics from a large amount ofexperimental data. To test the performance of the software, we analyzed experimental data froma 16N radioactive ion beam experiment for α-decay measurements. As a result of the analysis, weobserved the Bragg curve and measured the range of the 16N RI beam in the detector. Data werecalibrated against the calculation after comparing the Bragg curve to the one obtained from anenergy loss calculation in P-10 gas. We present a detailed description of the analysis software andits test results.
Design Study for the KOBRA (KOrea Broad acceptance Recoil spectrometer and Apparatus) at RAON
박진식,권영관,문준영,Tetsuro Komatsubara,정인일,김용학,윤종철,김용균,Seigo Kato,문창범,채경육,Shigeru Kubono 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.3
The KOBRA (KOrea Broad acceptance Recoil spectrometer and Apparatus) is a multi-purposerecoil spectrometer for low-energy nuclear experiments at the RAON accelerator complex. It isdivided into two stages based on the operational function: the first stage (F0-F3) is an in-flightseparator or beam transport line, and the second stage (F3-F5) is a large acceptance spectrometer. For spectrometers using radioactive ion (RI) beams, high performance, such as high resolutionand large acceptance, are especially required due to the limit of quality of RI beams. In thisrespect, a dispersion-matching technique and a movable magnet system were employed for highresolution and large acceptance, respectively. Reaction spectra at the focal plane for the dispersionmatching mode were obtained and analyzed using a Monte Carlo simulation code. In addition, thegeometrical angular acceptances with respect to the distance between the reaction target and thefirst Q-pole doublet of the second stage were calculated, and the expected maximum solid angle ofthe spectrometer was estimated.
Design study for the KOBRA (KOrea Broad acceptance Recoil spectrometer and Apparatus) at RAON
Park, Junesic,Kwon, Young Kwan,Moon, Jun Young,Komatsubara, Tetsuro,Jung, In-Il,Kim, Yong Hak,Yun, Chong Cheoul,Kim, Yong-Kyun,Kato, Seigo,Moon, Chang-Bum,Chae, Kyung Yuk,Kubono, Shigeru 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol. No.