Rutgers Nuclear Physics Group
Yale Experiments

 

Projectile Excitation Experiments

Beams of mono isotopic projectiles are excited on "light" target nuclei. In this so-called inverse kinematics condition all particles are moving forward in the lab system. The forward scattered target nuclei are detected in a particle detector placed at zero degrees with respect to the beam direction, while the beam is stopped in the backing of the target.
Advantage:
  • high coincidence rate for projectile deexcitation and target nuclei detection,
  • one target for many isotopes.

    At energies close to the Coulomb barrier projectiles pickup an α particle from a carbon target. This α-transfer reaction creates nuclei in conditions suitable for transient field measurements and opens the opportunity to study nuclei otherwise only available as radioactive beams.
    On the down side the spin alignment is rather small and higher excited states are populated necessitating feeding corrections.

    		• [picture]

    This is a Compilation of Transient Field experiments done at the Yale tandem from 1994 until shut down June 2011.

  • Final Tf experiments before shut down of the Tandem accelerator

    Various Calibration measurements
    Date  Runs  Beam  Energy  Comment 
    May11 various  96Ru, 76Ge, 86Sr 322, 200, 243 Projectile excitation on C using Fe target
    Apr11 166 - 273   106Pd 240, 270, 300, 330 Projectile excitation on C using Fe target
    Apr11 740157 - 168 74Ge 190 MeV Projectile excitation on C with iron as ferromagneticum

  • Sr

    Run Summary for Sr
    Date  Runs  Beam  Energy  Comment 
    May11 25 - 54  86Sr 243-269 Projectile excitation of 4+
    Oct10 96 - 136  88Sr, 84Sr 86Sr 250,265,275 MeV Projectile excitation and α transfer to 88Zr
    Apr10 1 - 94  84,88Sr 260 MeV Projectile excitation and α transfer
    Publications:
    Phys. Rev. C85(2012)044322

  • Ru, Mo, Pd

    Run Summary for Ru-isotopes including calibration measurements using 98Mo and 106Pd
    Date  Runs  Beam  Energy  Comment 
    Apr10  
          		106Pd, 96Ru, 300, 350 MeV Projectile excitation and α Transfer to 100Pd*
    Jan10  
          		96-104Ru, 106Pd 280 MeV Projectile excitation
    Sep09 1060040-77 106Pd, 96Ru 300/345 MeV Projectile excitation on C measured g(22+)
    Feb09 1020062-85
    1060001-39     		102Ru, 106Pd 160/227/280 MeV Projectile excitation on Mg and C measured g(2+)
    Oct07 1 - 61 96-104Ru, 98Mo 210/230 MeV Projectile excitation on Mg measured g(2+)

    Publications:
    Phys. Rev. C85(2012)017305
    * Phys. Rev. C84(2011)044327
    Phys. Rev. C83(2011)044315
    Phys. Rev. C82(2010)064301

  • Ge

    Run Summary for Ge-isotopes
    Date  Runs  Beam  Energy  Comment 
    Feb04 31 - 60 70-76Ge 190 MeV g(2+) and g(4+) Projectile excitation on C
    Jan06 63 - 150 70Ge 225 MeV g(4+) Projectile excitation on Mg
    Feb06 115 - 144 70Ge 225 MeV g(4+) Projectile excitation on C
    Feb07 760006 - 102 76Ge 190 - 230 MeV g(4+) Projectile excitation on C
    Feb08 760103 - 143 76Ge 200 MeV g(4+) Projectile excitation on Mg
    Feb08 720001 - 28 72Ge 200 MeV Projectile excitation on Mg
    Aug08 740001 - 85 74Ge 165 - 210 MeV Projectile excitation on Mg and C targets. Test of Particle detector array
    Sep08 740086 - 156 74Ge 200, 215 MeV Projectile excitation on Mg and C targets
    Sep08 720029 - 39 72Ge 200 MeV Projectile excitation on C
    Jun09 760145 - 222 70,76Ge 210 MeV Projectile excitation on C
    Apr11 740157 - 168 74Ge 190 MeV Projectile excitation on C with iron as ferromagneticum
    Publications:
    Phys. Rev. C88(2012)014301
    Phys. Rev. C76(2007)054311

  • Zn

    Run Summary for Zn-isotopes
    Date  Runs  Beam  Energy  Comment 
    Jul06 1001 - 1071 68Zn 180/200 MeV Projectile excitation on C measured g(2+) and g(4+)
    Aug07 3 - 91 70Zn 180/200 MeV Projectile excitation on C measured g(2+) and g(4+)
    Publications:
    Phys. Rev. C75(2007)021302
    Phys. Rev. C78(2008)031301
    Phys. Rev. C79(2009)054310

  • TF calibration measurements

    Run Summary for 56Fe
    Date  Runs  Beam  Energy  Comment 
    Mar09 1- 40 56Fe 100 - 180 MeV Projectile excitation on C and Mg

  • Zr

     
    Run Summary for Zr-isotopes
    Date  Runs  Beam  Energy 
    Aug98* 1 - 14 92Zr 294 MeV
    Nov98 19 - 40 92Zr 300 MeV
    Apr99 49 - 86 94Zr 300 MeV
    May99 87 - 128 94Zr 300 MeV
    Jul99 129 - 157 90Zr 270,280,300 MeV
    Dec99 161 - 189 96Zr 270,250 MeV
    Jan00 190 - 215 90Zr 270 MeV
    Jul00 220 - 251 90Zr 300 MeV
    Sep00 262 - 285 96Zr 265, 284 MeV
    Mar01 287 - 322 96Zr 265 MeV
    Sep02 330 - 347 96Zr 265 - 274 MeV
    Mar05 724 - 763 92Zr 275 - 290 MeV
    Apr05 1017 - 1039 94Zr 275 MeV
    Jul05 581 - 611 94Zr 275/285 MeV
    Apr06 1043 - 1497 94Zr 275 MeV
    Jul06 1417 - 1511 92Zr 275 MeV
    * Additional information

    Publications:
    Phys. Lett. B468(1999)13
    Phys. Lett. B494(2000)187
    Phys. Lett. B562(2003)193
    Phys. Rev. C 78(2008)031301

     

    Feb. 2004

    Various beams for projectile CE on C.
    Run Summary
    Experiment  Beam  Energy  Runs  Comment 
    Titanium 46Ti 100 MeV 15 - 20 Calibration of field
    Iron 56Fe 100 MeV 21 - 30 Calibration of field
    Germanium 76Ge 190 MeV 31 - 37 g(2+) and g(4+) measurement
      74Ge 190 MeV 38 - 49 g(2+) and g(4+) measurement
      70Ge 190 MeV 50 - 51 g(2+) measurement
      72Ge 190 MeV 52 - 60 g(2+) and g(4+) measurement

  • Ca

    Run Summary for Ca-isotopes
    Date  Runs  Beam  Energy  Comment 
    Mar01 1 - 31 40,42,44Ca 180 MeV Test runs in backscatter geometry
    Jul01 32 - 57 44Ca 185 MeV Checked Method using Se beam, tried 40Ca again
    Oct01 58 - 85 44Ca 90 MeV Inverse Kinematic, Carbon target (DAG)
    Mar02 87 - 120 40,44Ca 85 - 105,165 MeV Inverse Kinematic, poor transmission, no beam
    May02 120 - 130 44Ca 90 MeV Inv.Kin, Carbon target, NaI, again beam problems
    Jun02 136 - 160 44Ca 90,95 MeV Inv.Kin, Carbon target, NaI

    Publication:
    Phys. Lett. B559(2003)187

  • Te

    1. Apr98 Runs 1 - 9. (not converted)
      No tape, all data transferred via ftp.
    2. Dec02 Attenuation test for projectiles recoiling into vacuum
      The results show some loss of sensitivity but a TF experiment can be done.

    Transient field experiments with radioactive 132Te were carried out at Oak Ridge National Lab..

  • Nd

    1. May97 New DAQ system 146,148,150Nd runs 1-18.
    2. Nov97 Runs 19 -55.
    3. Apr98 Few extra runs.

      The experiments were continued at Berkeley.
      Publication:
      Phys.Lett. B 493(2000)7

  • Cr

    1. Aug96 50Cr test experiment at 180 MeV
    2. Dec96 runs 12 - 40 200 MeV (Conclusion no experiment!)
       

  • Se

    1. Jun96 all isotopes,runs 100 - 115
    2. Aug96 74,76,78,82Se, runs 118 - 145
    3. Jul97 all isotopes, runs 146 - 184 (not converted)

      Published in Phys.Rev.C 57(1998)2181

  • 152Gd

     
    Run Summary for 152Gd
    Date  Runs  Beam  Energy 
    Feb94 1 - 32  Ni  194 MeV 
    May94 33 - 83  Ni  180 MeV 
    Jul94 91 - 112  Ni  230 MeV 
    Aug94 113 - 130  Ni  214 MeV 
    Jan95 134 - 193  Ni  211 MeV 
    Mar96 197 - 233  S  100 MeV 

    The data were analyzed and are the basis for the thesis of Nicole Matt (Oct.97).
    The results were published in Phys.Rev.C 59(1999)665.
    No attempt was made to analyze other Gd isotopes contained in the data.


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    Gerfried Kumbartzki
    Last modified: Tue Jan 10 22:20:51 EST 2017