Triton

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L. Rao - One of the best experts on this subject based on the ideXlab platform.

  • Ternary Particle Emission in Spontaneous Fission of 250Cf and 252Cf and in Neutron Induced Fission of 249Cf and 251Cf
    Nuclear Physics, 2010
    Co-Authors: S. Vermote, J Heyse, P. Geltenbort, C. Wagemans, O. Serot, J. Van Gils, T. Soldner, I. Almahamid, G. Tian, L. Rao
    Abstract:

    Abstract The emission probabilities and the energy distributions of Tritons, α and 6He particles emitted in the spontaneous ternary fission (zero excitation energy) of 250Cf and 252Cf and in the cold neutron induced fission (excitation energy ≈ 6.5 MeV ) of 249Cf and 251Cf are determined. The particle identification was done with suited Δ E – E telescope detectors, at the IRMM (Geel, Belgium) for the spontaneous fission and at the ILL (Grenoble, France) for the neutron induced fission measurements. Hence particle emission characteristics of the fissioning systems 250Cf and 252Cf are obtained at zero and at about 6.5 MeV excitation energies. While the Triton emission probability is hardly influenced by the excitation energy, the 4He and 6He emission probability in spontaneous fission is higher than for neutron induced fission. This can be explained by the strong influence of the cluster preformation probability on the ternary particle emission probability.

  • Ternary particle emission in spontaneous fission of 250Cf and 252Cf and in neutron induced fission of 249Cf and 251Cf
    Nuclear Physics A, 2010
    Co-Authors: S. Vermote, J Heyse, P. Geltenbort, C. Wagemans, O. Serot, J. Van Gils, T. Soldner, I. Almahamid, G. Tian, L. Rao
    Abstract:

    The emission probabilities and the energy distributions of Tritons, a and 6He particles emitted in the spontaneous ternary fission (zero excitation energy) of 250Cf and 252Cf and in the cold neutron induced fission (excitation energy ¿ 6.5 MeV) of 249Cf and 251Cf are determined. The particle identification was done with suited ¿E-E telescope detectors, at the IRMM (Geel, Belgium) for the spontaneous fission and at the ILL (Grenoble, France) for the neutron induced fission measurements. Hence particle emission characteristics of the fissioning systems 250Cf and 252Cf are obtained at zero and at about 6.5 MeV excitation energies. While the Triton emission probability is hardly influenced by the excitation energy, the 4He and 6He emission probability in spontaneous fission is higher than for neutron induced fission. This can be explained by the strong influence of the cluster preformation probability on the ternary particle emission probability.JRC.D.4-Nuclear physic

S. Vermote - One of the best experts on this subject based on the ideXlab platform.

  • Ternary Particle Emission in Spontaneous Fission of 250Cf and 252Cf and in Neutron Induced Fission of 249Cf and 251Cf
    Nuclear Physics, 2010
    Co-Authors: S. Vermote, J Heyse, P. Geltenbort, C. Wagemans, O. Serot, J. Van Gils, T. Soldner, I. Almahamid, G. Tian, L. Rao
    Abstract:

    Abstract The emission probabilities and the energy distributions of Tritons, α and 6He particles emitted in the spontaneous ternary fission (zero excitation energy) of 250Cf and 252Cf and in the cold neutron induced fission (excitation energy ≈ 6.5 MeV ) of 249Cf and 251Cf are determined. The particle identification was done with suited Δ E – E telescope detectors, at the IRMM (Geel, Belgium) for the spontaneous fission and at the ILL (Grenoble, France) for the neutron induced fission measurements. Hence particle emission characteristics of the fissioning systems 250Cf and 252Cf are obtained at zero and at about 6.5 MeV excitation energies. While the Triton emission probability is hardly influenced by the excitation energy, the 4He and 6He emission probability in spontaneous fission is higher than for neutron induced fission. This can be explained by the strong influence of the cluster preformation probability on the ternary particle emission probability.

  • Ternary particle emission in spontaneous fission of 250Cf and 252Cf and in neutron induced fission of 249Cf and 251Cf
    Nuclear Physics A, 2010
    Co-Authors: S. Vermote, J Heyse, P. Geltenbort, C. Wagemans, O. Serot, J. Van Gils, T. Soldner, I. Almahamid, G. Tian, L. Rao
    Abstract:

    The emission probabilities and the energy distributions of Tritons, a and 6He particles emitted in the spontaneous ternary fission (zero excitation energy) of 250Cf and 252Cf and in the cold neutron induced fission (excitation energy ¿ 6.5 MeV) of 249Cf and 251Cf are determined. The particle identification was done with suited ¿E-E telescope detectors, at the IRMM (Geel, Belgium) for the spontaneous fission and at the ILL (Grenoble, France) for the neutron induced fission measurements. Hence particle emission characteristics of the fissioning systems 250Cf and 252Cf are obtained at zero and at about 6.5 MeV excitation energies. While the Triton emission probability is hardly influenced by the excitation energy, the 4He and 6He emission probability in spontaneous fission is higher than for neutron induced fission. This can be explained by the strong influence of the cluster preformation probability on the ternary particle emission probability.JRC.D.4-Nuclear physic

Cris W. Barnes - One of the best experts on this subject based on the ideXlab platform.

  • Triton Burnup Measurements and Calculations on TFTR.
    Nuclear Fusion, 1998
    Co-Authors: Cris W. Barnes, J. D. Strachan, D. L. Jassby, Hans-stephan Bosch, H.w. Hendel, A. G. A. Huibers, R. Motley, E. B. Nieschmidt, T. Saito, M. Bitter
    Abstract:

    Measurements of the burnup of fusion product Tritons in TFTR are presented. Interpretation of Triton burnup experiments requires three accurate components: the measurement of the 2.5 MeV neutron emission, the measurement of the 14 MeV neutron emission and a calculation of the expected burnup ratio from the measured plasma parameters. The absolute calibration for the 14 MeV neutron measurements is provided by an NE213 proton recoil spectrometer. Time dependent burnup measurements for three plasma conditions selected for optimum detector operation are shown. Measurements of the time integrated Triton burnup from copper activation foils (cross-calibrated to the NE213 measurements) are presented. Descriptions are provided of the neutron detectors and the plasma diagnostics whose data are used as input to the calculation of the expected burnup. All these measurements find that the Triton burnup on TFTR is 1/2 ± 1/4 the classical expectations for a wide variety of discharges. The burnup decreases for relatively longer Triton slowing down times, implying possible fast ion diffusion coefficients of ~0.1 m2/s. Alternatively, burnup appears to decrease with increasing major radius of the Triton source and edge safety factor qcyl, implying that ripple losses may be playing a role. Triton burnup is a very sensitive measure of anomalous fast ion transport; similar levels of diffusive transport in an ignited reactor would have minimal impact on the alpha particles.

  • Triton burnup profile measurements
    Nuclear Fusion, 1996
    Co-Authors: J. D. Strachan, J.s. Mccauley, Tobin Munsat, Cris W. Barnes, R.v. Budny, D. L. Jassby, L. C. Johnson, D.c. Mccune, A. L. Roquemore
    Abstract:

    The TFTR helium proportional counters measured the 14 MeV neutron emission profiles from the 1 MeV Tritons produced by d(d,p)t fusion reactions in deuterium plasmas. The magnitude and profile of the 1 MeV Triton burnup indicate that there is no energetic Triton transport (D ≤ 0.1 m2/s) as the Tritons slow down from 1 MeV to ~0.09 MeV

J. D. Strachan - One of the best experts on this subject based on the ideXlab platform.

  • Triton Burnup Measurements and Calculations on TFTR.
    Nuclear Fusion, 1998
    Co-Authors: Cris W. Barnes, J. D. Strachan, D. L. Jassby, Hans-stephan Bosch, H.w. Hendel, A. G. A. Huibers, R. Motley, E. B. Nieschmidt, T. Saito, M. Bitter
    Abstract:

    Measurements of the burnup of fusion product Tritons in TFTR are presented. Interpretation of Triton burnup experiments requires three accurate components: the measurement of the 2.5 MeV neutron emission, the measurement of the 14 MeV neutron emission and a calculation of the expected burnup ratio from the measured plasma parameters. The absolute calibration for the 14 MeV neutron measurements is provided by an NE213 proton recoil spectrometer. Time dependent burnup measurements for three plasma conditions selected for optimum detector operation are shown. Measurements of the time integrated Triton burnup from copper activation foils (cross-calibrated to the NE213 measurements) are presented. Descriptions are provided of the neutron detectors and the plasma diagnostics whose data are used as input to the calculation of the expected burnup. All these measurements find that the Triton burnup on TFTR is 1/2 ± 1/4 the classical expectations for a wide variety of discharges. The burnup decreases for relatively longer Triton slowing down times, implying possible fast ion diffusion coefficients of ~0.1 m2/s. Alternatively, burnup appears to decrease with increasing major radius of the Triton source and edge safety factor qcyl, implying that ripple losses may be playing a role. Triton burnup is a very sensitive measure of anomalous fast ion transport; similar levels of diffusive transport in an ignited reactor would have minimal impact on the alpha particles.

  • Triton burnup profile measurements
    Nuclear Fusion, 1996
    Co-Authors: J. D. Strachan, J.s. Mccauley, Tobin Munsat, Cris W. Barnes, R.v. Budny, D. L. Jassby, L. C. Johnson, D.c. Mccune, A. L. Roquemore
    Abstract:

    The TFTR helium proportional counters measured the 14 MeV neutron emission profiles from the 1 MeV Tritons produced by d(d,p)t fusion reactions in deuterium plasmas. The magnitude and profile of the 1 MeV Triton burnup indicate that there is no energetic Triton transport (D ≤ 0.1 m2/s) as the Tritons slow down from 1 MeV to ~0.09 MeV

M. Bitter - One of the best experts on this subject based on the ideXlab platform.

  • Triton Burnup Measurements and Calculations on TFTR.
    Nuclear Fusion, 1998
    Co-Authors: Cris W. Barnes, J. D. Strachan, D. L. Jassby, Hans-stephan Bosch, H.w. Hendel, A. G. A. Huibers, R. Motley, E. B. Nieschmidt, T. Saito, M. Bitter
    Abstract:

    Measurements of the burnup of fusion product Tritons in TFTR are presented. Interpretation of Triton burnup experiments requires three accurate components: the measurement of the 2.5 MeV neutron emission, the measurement of the 14 MeV neutron emission and a calculation of the expected burnup ratio from the measured plasma parameters. The absolute calibration for the 14 MeV neutron measurements is provided by an NE213 proton recoil spectrometer. Time dependent burnup measurements for three plasma conditions selected for optimum detector operation are shown. Measurements of the time integrated Triton burnup from copper activation foils (cross-calibrated to the NE213 measurements) are presented. Descriptions are provided of the neutron detectors and the plasma diagnostics whose data are used as input to the calculation of the expected burnup. All these measurements find that the Triton burnup on TFTR is 1/2 ± 1/4 the classical expectations for a wide variety of discharges. The burnup decreases for relatively longer Triton slowing down times, implying possible fast ion diffusion coefficients of ~0.1 m2/s. Alternatively, burnup appears to decrease with increasing major radius of the Triton source and edge safety factor qcyl, implying that ripple losses may be playing a role. Triton burnup is a very sensitive measure of anomalous fast ion transport; similar levels of diffusive transport in an ignited reactor would have minimal impact on the alpha particles.