Precision Measurements for Nuclear Evaluation at Texas A&M Center

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"Explore the strategic priorities and ongoing research at Texas A&M Evaluation Center, focusing on precise internal conversion coefficient measurements using cutting-edge experimental methodologies and advanced nuclear data evaluation procedures. Discover the center's innovative approach to enhancing the ENSDF database and its significant role in advancing nuclear science. Join the mission for excellence in nuclear data evaluation and research at Cyclotron Institute, Texas A&M University."

  • Texas A&M
  • Evaluation Center
  • Nuclear Science
  • Experimental Methodologies
  • ENSDF

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  1. Texas A&M Evaluation Texas A&M Evaluation Center Strategic Priorities Strategic Priorities Center Continuing Continuing ENSDF First First S Strategic All All other other priorities Produce Produce experimental experimental nuclear Precision Internal Conversion Coefficients Measurements Precision Internal Conversion Coefficients Measurements at Cyclotron Cyclotron Institute, Texas A&M University Institute, Texas A&M University to give USDNP the best approach for ENSDF ICC approach for ENSDF ICC- -calculated values (concluding cases calculated values (concluding cases pending on conditions) pending on conditions) E Experimental xperimental studies studies of of Medical Medical Isotopes Isotopes Invers kinematics methodology Invers kinematics methodology, , Cyclotron Institute, University University Reevaluation Reevaluation of of data data procedures procedures for for basic Level Level scheme scheme re re- -concept concept based based on experimental experimental data data evidence evidence ENSDF Mass trategic P Priority priorities will Mass Chain riority according according to will be be strictly nuclear data Chain Evaluation Evaluation ( (1 1 FTE) FTE) Mission Statement Statement. . subordinated to data to to aid aid data data evaluation to the the Mission strictly subordinated to this this purpose purpose evaluation at to give USDNP the best Cyclotron Institute, Texas A&M Texas A&M basic science science and on Repeatability Repeatability, , a a newly and data data evaluation evaluation newly revealed revealed

  2. Texas A&M Evaluation Center: Texas A&M Evaluation Center: Data Evaluation Station at Cyclotron Data Evaluation Station at Cyclotron Radioactive Ion Beam Facility Radioactive Ion Beam Facility to assist experiments and to assist experiments and pre pre- -evaluate data evaluate data Focus on the Light-Ion Guide (LIG), the Heavy Ion Guide (HIG) and the Charge-Breeding Electron- Cyclotron-Resonance ion source (CB-ECRIS). TAMUTRAP

  3. Texas A&M Evaluation Texas A&M Evaluation Center Expanded Involvement in Applied Measurements of Precision Internal Conversion Coefficients Precision Internal Conversion Coefficients Theme: Precision Theme: Precision Measurements for USNDP Measurements for USNDP Texas A&M Center implied decisively by decade Texas A&M Center implied decisively by decade- -long program of Internal Conversion Coefficient (ICC) Precision Measurements to guide USNDP for Conversion Coefficient (ICC) Precision Measurements to guide USNDP for best approach of theoretical ENSDF database ICC values best approach of theoretical ENSDF database ICC values Center long program of Internal Calculated K values: No vacancy 23960 131.3 1.425 1544 179.5 468.6 2.677 0.09068 92.0 4.191 252 Parent State 93mNb 103mRh 111mCd 119mSn 125mTe 127mTe 134mCs 137mBa 193mIr 197mPt Transition Energy (keV) 30.760(5) 39.752(6) 150.825(15) 65.660(10) 109.276(15) 88.23(7) 127.502(3) 661.659(3) 80.22(2) 346.5(2) Measured K 25600(900) 141.1(23) 1.449(18) 1621(25) 185.0(40) 484(6) 2.742(15) 0.0915(5) 103.0(8) 4.23(7) SCF Frozen Orbitals" 25990 139.4 1.451 1618 185.2 486.4 2.741 0.0915 103.3 4.276 Multipolarity M4 25440 137.2 1.446 1603 184.2 483.1 2.73 0.091 99.7 4.265 21.5 1 E3 E3 M4 M4 M4 E3 M4 M4 M4 2 3 4 5 6 7 8 9 10 2: 1.5

  4. 8% (a) With vacancy (FO) Difference (exp-theory) 4% as % 0% -4% -8% (b) No vacancy 12% Difference (exp-theory) as % 8% 4% 0% 93mNb 103mRh 111mCd 134mCs 119mSn 125mTe 127mTe 137mBa 193mIr 197mPt -4%

  5. Texas A&M Evaluation Center Texas A&M Evaluation Center Expanded Involvement in Applied Measurements for Medical Isotopes Production by Inverse Kinematics Theme Theme: : Research for Medical Isotopes Production by Inverse Kinematics Research for Medical Isotopes Production by Inverse Kinematics Innovative method for the production of important medical radioisotopes based on the nuclear reaction in inverse kinematics, by: Directing a heavy ion beam of appropriate energy on a light target (e.g., H, d, He) and Collecting the isotope of interest on an appropriate catcher after the target. e.g.

  6. Case Studies (at this stage beyond the proof-of-principle): hydrogen gas target cryogenic gas target Secondary neutrons from the primary reaction were used to irradiate a secondary target for further radioisotope production (to be further developed) At K500 Cyclotron & MARS spectrometer of Texas A&M Cyclotron Institute 67Cu (T1/2 = 62 h) via the reaction of 70Zn beam of 15 MeV/nucleon with a cryogenic 99Mo (T1/2 = 66 h) via the reaction of 100Mo of 12 MeV/nucleon with a cryogenic 4He (b) (a) Radioactive isotopes identified by - -ray spectroscopy: (a) 67Cu run (b) 99Mo run ray spectroscopy:

  7. Texas A&M Evaluation Center Texas A&M Evaluation Center New Initiatives & Directions Data Evaluation Evaluation for for Basic Basic Physics Reevaluation Reevaluation of of data data procedures procedures for Level Level scheme scheme re re- -concept concept based experimental experimental evidence evidence Theme Theme: : Data Physics for basic basic science based on on Repeatability Repeatability, , a a newly science and and data data evaluation evaluation newly revealed revealed Regular E i-E j Distributions D(dist) 3D Correlations (high spin data) in the Level Scheme

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