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Title: Development of a High Solid-Angle Silicon Detector Array for Measurement of Transfer Reactions in Inverse Kinematics

Abstract

The development of high quality radioactive beams, such as those at the HRIBF at Oak Ridge National Laboratory, has made possible the measurement of transfer reactions in inverse kinematics on unstable nuclei. Measurement of (d,p) reactions on neutron-rich nuclei yield data on the evolution of nuclear structure away from stability, and are of astrophysical interest due to the proximity of suggested nuclear burning paths in the astrophysical r-process in supernovae. Experimentally, (d,p) reactions on heavy (Z = 50) fission fragments are complicated by the strongly inverse kinematics, and the relatively low beam intensities. Consequently, ejectile detection with high resolution in position and energy, a high dynamic range and a high solid angular coverage is required. The Oak Ridge Rutgers University Barrel Array (ORRUBA) is a new silicon detector array currently under construction, optimized for the measurement of (d,p) reactions in inverse kinematics. It consists of two rings of silicon detectors, providing a high solid angular coverage for angles symmetrically forward and backward of 90 degrees. Resistive strip detectors are used to obtain high precision position and energy measurement of reaction ejectiles.

Authors:
 [1];  [1];  [1];  [2];  [1];  [3];  [3];  [3];  [3];  [4];  [3]
  1. Rutgers University
  2. University of Tennessee, Knoxville (UTK)
  3. ORNL
  4. Tennessee Technological University
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Holifield Radioactive Ion Beam Facility
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931883
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: Nineteenth International Conference on The Application of Accelerators in Research and Industry, Fort Worth, TX, USA, 20060820, 20060820
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; FISSION FRAGMENTS; NUCLEAR STRUCTURE; R PROCESS; SILICON; TRANSFER REACTIONS

Citation Formats

Pain, S. D., Cizewski, J. A., Hatarik, Robert, Jones, K. L., Thomas, J. S., Bardayan, Daniel W, Blackmon, Jeff C, Nesaraja, Caroline D, Smith, Michael Scott, Kozub, R. L., and Johnson, Micah. Development of a High Solid-Angle Silicon Detector Array for Measurement of Transfer Reactions in Inverse Kinematics. United States: N. p., 2007. Web.
Pain, S. D., Cizewski, J. A., Hatarik, Robert, Jones, K. L., Thomas, J. S., Bardayan, Daniel W, Blackmon, Jeff C, Nesaraja, Caroline D, Smith, Michael Scott, Kozub, R. L., & Johnson, Micah. Development of a High Solid-Angle Silicon Detector Array for Measurement of Transfer Reactions in Inverse Kinematics. United States.
Pain, S. D., Cizewski, J. A., Hatarik, Robert, Jones, K. L., Thomas, J. S., Bardayan, Daniel W, Blackmon, Jeff C, Nesaraja, Caroline D, Smith, Michael Scott, Kozub, R. L., and Johnson, Micah. Mon . "Development of a High Solid-Angle Silicon Detector Array for Measurement of Transfer Reactions in Inverse Kinematics". United States. doi:.
@article{osti_931883,
title = {Development of a High Solid-Angle Silicon Detector Array for Measurement of Transfer Reactions in Inverse Kinematics},
author = {Pain, S. D. and Cizewski, J. A. and Hatarik, Robert and Jones, K. L. and Thomas, J. S. and Bardayan, Daniel W and Blackmon, Jeff C and Nesaraja, Caroline D and Smith, Michael Scott and Kozub, R. L. and Johnson, Micah},
abstractNote = {The development of high quality radioactive beams, such as those at the HRIBF at Oak Ridge National Laboratory, has made possible the measurement of transfer reactions in inverse kinematics on unstable nuclei. Measurement of (d,p) reactions on neutron-rich nuclei yield data on the evolution of nuclear structure away from stability, and are of astrophysical interest due to the proximity of suggested nuclear burning paths in the astrophysical r-process in supernovae. Experimentally, (d,p) reactions on heavy (Z = 50) fission fragments are complicated by the strongly inverse kinematics, and the relatively low beam intensities. Consequently, ejectile detection with high resolution in position and energy, a high dynamic range and a high solid angular coverage is required. The Oak Ridge Rutgers University Barrel Array (ORRUBA) is a new silicon detector array currently under construction, optimized for the measurement of (d,p) reactions in inverse kinematics. It consists of two rings of silicon detectors, providing a high solid angular coverage for angles symmetrically forward and backward of 90 degrees. Resistive strip detectors are used to obtain high precision position and energy measurement of reaction ejectiles.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

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  • The development of high quality radioactive beams has made possible the measurement of transfer reactions in inverse kinematics on unstable nuclei. Measurement of (d,p) reactions on neutron-rich nuclei yield data on the evolution of nuclear structure away from stability, and are of astrophysical interest. Experimentally, (d,p) reactions on heavy (Z=50) fission fragments are complicated by the strongly inverse kinematics, and relatively low beam intensities. Consequently, ejectile detection with high resolution in position and energy, a high dynamic range and a high solid angular coverage is required. The Oak Ridge Rutgers University Barrel Array (ORRUBA) is a new silicon detector arraymore » optimized for the measurement of (d,p) reactions in inverse kinematics.« less
  • No abstract prepared.
  • High quality radioactive beams have recently made possible the measurement of (d,p) reactions on unstable nuclei in inverse kinematics, which can yield information on the development of single-neutron structure away from stability, and are of astrophysical interest due to the proximity to suggested r-process paths. The Oak Ridge Rutgers University Barrel Array (ORRUBA) is a new high solid-angular coverage array, composed of two rings of silicon detectors, optimized for measuring (d,p) reactions. A partial implementation has been used to measure (d,p) reactions on nuclei around the N = 82 shell closure.
  • Over the past four years we have studied (p,p'), (d,p) ,(d,3He) and other reactions using radioactive beams in inverse kinematics to obtain spectroscopic information for nuclei away from the valley of stability After a general overview of the experimental method we will describe our ongoing MUST II development. This is to build a very compact (1000cm3) three stage telescope with an active area of 100cm2 with position resolution of 0.7x0.7 mm2 and time of flight measurement. The mass identification and energy dynamic range is of 0.4 to 80 MeV.A up to alpha particles. The compactness of the array is assuredmore » through the use of an ASIC development to measure the time of flight and energy. The large solid angle coverage of 2.6sr and compactness of this array will allow it to be used in particle-gamma coincidence experiments.« less
  • Two N=51 isotones have been measured using (d,p) reactions in inverse kinematics at the Holifield Radioactive Beam Facility (HRIBF) of Oak Ridge National Laboratory. Additionally, we have performed a test measurement using a stable 124Sn beam in preparation for measurements of the 2H(130,132Sn,p)131,133Sn reactions. Preliminary results for 83Ge and 85Se suggest a 5/2+ ground state and a 1/2+ first excited state for both isotopes, in agreement with systematics for the N=51 isotones. The excitation energy of the first excited state is shown to drop as the proton number is reduced. Proton angular distributions following the 2H(124Sn,p)125Sn reaction show sensitivity tomore » the l-value of the transfered nucleon and spectroscopic factors are in agreement with previous measurements in normal kinematics.« less