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Proposal P-242 to the INTC

Proposal P-242 to the INTC. SEARCH FOR NEW CANDIDATES FOR THE NEUTRINO-ORIENTED PRECISION MASS SPECTROMETRY. Spokesperson : Sergey Eliseev GSI mbH, Darmstadt, Germany. Yu. Novikov, D. Beck, K. Blaum, M. Block, M. Breitenfeldt, S. Eliseev,

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Proposal P-242 to the INTC

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  1. Proposal P-242 to the INTC SEARCH FOR NEW CANDIDATES FOR THE NEUTRINO-ORIENTED PRECISION MASS SPECTROMETRY Spokesperson: Sergey Eliseev GSI mbH, Darmstadt, Germany Yu. Novikov, D. Beck, K. Blaum, M. Block, M. Breitenfeldt, S. Eliseev, V. Fedoseev, F. Gatti, S. George, F. Herfurth, A. Herlert, A. Kellerbauer, H.-J. Kluge, M. Kowalska, D. Lunney, S. Naimi, D. Neidherr, S. Schwarz, L. Schweikhard, M. Seliverstov, A.Sokolov CERN-GSI-Mainz-Heidelberg-PNPI-Greifswald-Genoa-Orsay-MSU

  2. Experimental knowledge on mn 10000 b- from decay 163Ho 35S from e-capture 37Ar & 22Na 163Ho 1000 3H 163Ho 193Pt 3H 3H Limit on mn ,eV 100 187Re 3H 10 3H 3H 1 1940 1950 1960 1970 1980 1990 2000 2010 Year S.A. Eliseev. INTC meeting 11.02.2008

  3. cryogenic m-calorimeters Penning traps (Z-1,A)g + Bi Z,A Qn (Z-1,A)h Smaller Qn→ higher contribution of mn Qe Bi Qe – Bi should beas small as possible Qe < 100 keV (Z-1,A)g En = K + mn = Qe - Bi Qe-value: (accuracy ~1 eV) mn < a feweV En Bi – electron binding: (accuracy ~1 eV) smaller En higher contribution of mn e-capture: general information (Z,A) + e (Z-1,A)h + Qn Qn = En + mn = Qe – Bi (Z,A) S.A. Eliseev. INTC meeting 11.02.2008

  4. T1/2=444 y 80.725 K 0+ 194Hg Qε=(69±14) keV Qn=(-12±14) keV 1- 194Au T1/2=4.57 ky T1/2=50 ky 0+ 2.0468 M1 202Pb 1.8418 M2 Qn≈(35±15) keV Qε=2.6 keV Qε=(50±15) keV Qn≈0.55 keV 15.35 L1 N 1,2 - 5 2- 2 202Tl 163 Dy Candidates with evaluated Qe<100 keV S.A. Eliseev. INTC meeting 11.02.2008

  5. PROPOSAL S.A. Eliseev. INTC meeting 11.02.2008

  6. Beam-time request Experiment 1 Experiment 2 Total number of shifts: 8 Accuracy of measured Qe-values could be ~1.5 keV S.A. Eliseev. INTC meeting 11.02.2008

  7. Beam-time request: off-line extension Mass measurement network 203 195 Total number of shifts: 8+3 (cool down period of UCx) Accuracy of measured Qe-values could be ~0.5 keV S.A. Eliseev. INTC meeting 11.02.2008

  8. Why ISOLDE? LEBIT, MSU, USA A>100 are not produced SHIPTRAP, GSI, Germany Fusion-evaporation reaction; no suitable BEAM+TARGET combination SMILETRAP, Sweden Only stable nuclides are produced TITAN, Canada New system, light nuclides measured so far, no ion source for heavy nuclides JYFLTRAP, Finland no experience with heavy nuclides S.A. Eliseev. INTC meeting 11.02.2008

  9. BK=80.725 keV Electron binding energy BL=11.9-14.35 194Au Nuclear excitations T1/2 =444 y 0+ 194Hg Qε=69±14 keV (2)- 35.19 1- 0 5/2- 38 h 194Au Yu. Novikov,GSI-08.03.07

  10. SHIPTRAP +JYFLTRAP ISOLTRAP 100Pd-100Rh, 101Rh-101Ru, 134Ce-134La, 161Ho-161Dy, 175Hf-175Lu, 183Re-183W, 194Hg-194Au 131Cs-131Xe, 157Tb-157Gd, 159Dy-159Tb, 161Ho-161Dy, 171Tm-171Yb, 201Tl-201Hg, 131Cs-131Xe Bi Gran Sasso Lab+ trap assisted spectroscopy

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