Nuclear Data Sheets for A = 47

Burrows, T.W.

doi:10.1016/j.nds.2007.04.002

Cited by 63 publications

(46 citation statements)

References 180 publications

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“…For isotopes 46 Ti, 48 Ti and 50 Ti these S factors were obtained from (p, d) reaction data [5]. For 40 Ca and 48 Ca the S factors were extracted from [6] and [7], respectively. Wave functions for 1 -T < and for 1 -T > states in Ca and Ti even-even isotopes were used to calculate the E1 form factors at photopoint.…”

Section: Results Of Pcc Sm Calculations For 46mentioning

confidence: 99%

“…The spectroscopic factors used in the calculation are taken from 48 Ca(d,t), 48 Ca(p,d) reactions [7] where projectile energies were not higher than 40 MeV. The comparison of two direct experiments [6] and [7] shows that if the energy of projectile is low, the sum of spectroscopic factors for subshell would be underestimated, e.g. the summed occupation number for 1d 5/2 subshell in 48 Ca according to [7] is only 0.95.…”

Section: Ca and 48 Camentioning

confidence: 99%

“…The comparison of two direct experiments [6] and [7] shows that if the energy of projectile is low, the sum of spectroscopic factors for subshell would be underestimated, e.g. the summed occupation number for 1d 5/2 subshell in 48 Ca according to [7] is only 0.95. The same number for 40 Са is 5.41 (see [6]).…”

Section: Ca and 48 Camentioning

confidence: 99%

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Origins of dipole resonance strength fragmentation in calcium and titanium isotopes

Goncharova

Skorodumina

2012

EPJ Web of Conferences

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Abstract. Theoretical description of dipole resonances in 46 Ti, 48 Ti, 50 Ti, 48 Ca, 40 Ca was performed. The distribution of the "hole" among the states of final nuclei was taken into account using information on pick-up reactions. The obtained results are in reasonable agreement with experimental data. Description of multipole resonancesThe giant multipole resonances (MR) represent the most striking feature of the reactions cross sections up to energy excitation E<40 MeV and transferred momentum q< 3 fm -1 . The interpretation of MR complicated structure and its dependence on the individual properties of nuclei is one of the aims of nuclear theory. The giant dipole resonance E1 is up to now the best explored among the multipole resonances [1]. The efforts to explain the origin of its position on energy axis promote the creation of multiparticle shell model (MSM). The success of MSM in interpretation of dipole resonance as a result of collectivization of so-called "doorway states" could not eliminate all problems in its theoretical description. One of them is the need to explain the great differences in widths and structures of the distributions of E1 strength in various nuclei. The growth of information on structure of giant resonances has shown that the MSM calculations based on particle-hole configurations are unable to reproduce complicated structure of MR. The usual way to overcome this problem is to expand the basic space and to take into account the interaction of "doorway" states with more complicated configurations, first of all with collective phonons. Applications of this method to the resonances in the middle and heavy closed-shell nuclei were rather successful, but the interpretation of structure and decay properties of MR in open shell nuclei represents a challenge to the theory. Moreover, due to pairing forces the "magic" nuclei are not bona fide completely closed-shell systems. Particle-core coupling version of Shell ModelOne of the possible ways to build a set of basic configurations which could be used as doorway states in the microscopic description of multipole resonances in open shell nuclei is to take into account the distribution of the "hole" configurations among the states of residual (A-1) nuclei.In the "Particle Core Coupling version of Shell Model" (PCC SM) these distributions are taken into account in microscopic description of multipole resonances [2,3]. Theoretical description of MR in 1p-shell nuclei in the PCC SM has shown good agreement with experimental data for nuclei with A from 7 up to 15 [3]. The same approach to sd-shell nuclei strikes against the lack of reliable wave functions for the nuclear ground states. The alternative way to estimate the probabilities of the various core states which appears when one of the nucleons would be extracted from nucleus is to use the experimental data on the spectroscopy of direct pick-up reactions .This method was applied to calculations of multipole resonances in sd-shell nuclei [4]. Wave functions of excited nuclear states in th...

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Section: Results Of Pcc Sm Calculations For 46mentioning

confidence: 99%

Section: Ca and 48 Camentioning

confidence: 99%

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Origins of dipole resonance strength fragmentation in calcium and titanium isotopes

Goncharova

Skorodumina

2012

EPJ Web of Conferences

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“…The E x values of the 47 V states could be determined by an interpolation process and they are listed in Tables I-VI. In 47 V, accurate E x values of states are known up to 6.8 MeV [28], as shown in Table I and Table II. Most of these E x values could be reproduced within a difference of a few keV.…”

Section: Inmentioning

confidence: 99%

“…It should be noted that the GT transition strength in the T z = +1/2 → +3/2 direction can be studied in the β + -decay of 47 V, and thus this GT strength can provide a standard B(GT) value for the purpose of normalization. A logf t value of 4.901 (5) has been reported for the GT transition from the g.s of 47 V to the g.s of 47 Ti [28]. The B(GT) values in the direction of the CE-reaction can be derived from this by correcting for the (2J + 1) factors of the spin ClebschGordan coefficients [5].…”

Section: Inmentioning

confidence: 99%

High-resolution study of Gamow-Teller transitions in the47Ti(3He,t)
Ganioğlu¹,
Fujita²,
Fujita³
et al. 2013
Phys. Rev. C

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Given the importance of Gamow-Teller (GT) transitions in nuclear structure and astrophysical nuclear processes, we have studied Tz = +3/2 → +1/2, GT transitions starting from the 47 Ti nucleus in the ( 3 He, t) charge-exchange reaction at 0• and at an intermediate incident energy of 140 MeV/nucleon. The experiments were carried out at the Research Center for Nuclear Physics (RCNP), Osaka using the high resolution facility consisting of a high-dispersion beam line and the Grand-Raiden spectrometer. With an energy resolution of 20 keV, individual GT transitions were observed and GT strength was derived for each state populated up to an excitation energy (Ex) of 12.5 MeV. The GT strength was widely distributed from low excitation energy up to 12.5 MeV, where we had to stop the analysis due to the high level density. The distribution of the GT strengths was compared with the results of shell model calculations using the GXPF1 interaction. The calculations could reproduce the experimental GT distributions well. The GT transitions from the ground state of 47 Ti and the M 1 transitions from the isobaric analog state in 47 V to the same low-lying states in 47 V are analogous. It was found that the ratios of GT transition strengths to the ground state, the 0.088 MeV, and the 0.146 MeV states are similar to the ratios of the strengths of the analogous M 1 transitions from the IAS to these states. The measured distribution of the GT strengths was also compared with those starting from the Tz = +3/2 nucleus 41 K to the Tz = +1/2 nucleus 41 Ca.

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Results from the experimental evaluation of CeBr scintillators for He prompt gamma spectroscopy

et al. 2019

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Purpose The presence of range uncertainties hinders the exploitation of the full potential of charged particle therapy. Several range verification techniques have been proposed to mitigate this limitation. Prompt gamma spectroscopy (PGS) is among the most promising solutions for online and in vivo range verification. In this work, we present the experimental results of the detection of prompt gamma radiation, induced by 4He beams at the Heidelberg Ion‐Beam Therapy Center (HIT). The results were obtained, using a spectroscopic unit of which the design has been optimized using Monte Carlo simulations. Methods The spectroscopic unit is composed by a primary cerium bromide (CeBr3) crystal surrounded by a secondary bismuth germanate (BGO) crystal for anticoincidence detection (AC). The digitalization of the signals is performed with an advanced FADC/FPGA system. The 4He beams at clinical energies and intensities are delivered to multiple targets in the experimental cave at the HIT. We analyze the production of prompt gamma on oxygen and carbon targets, as well as high Z materials such as titanium and aluminum. The quantitative analysis includes a systematic comparison of the signal‐to‐noise ratio (SNR) improvement for the spectral lines when introducing the AC detection. Moreover, the SNR improvement could provide a reduction of the number of events required to draw robust conclusions. We perform a statistic analysis to determine the magnitude of such an effect. Results We present the energy spectra detected by the primary CeBr3 and the secondary BGO. The combination of these two detectors leads to an average increase of the signal‐to‐noise ratio by a factor 2.1, which confirms the Monte Carlo predictions. The spectroscopic unit is capable of detecting efficiently the discrete gamma emission over the full energy spectrum. We identify and analyze 19 independent spectral lines in an energy range spacing from Eγ=0.718 MeV to Eγ=6.13 MeV. Moreover, when introducing the AC detection, the number of events required to determine robustly the intensity of the discrete lines decreases. Finally, the analysis of the low‐energy reaction lines determines whether a thin metal insert is introduced in the beam direction. Conclusions This work provides the experimental characterization of the spectroscopy unit in development for range verification through PGS at the HIT. Excellent performances have been demonstrated over the full prompt gamma energy spectrum with 4He beams at clinical energies and intensities.

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Nuclear Data Sheets for A = 47

Cited by 63 publications

References 180 publications

Origins of dipole resonance strength fragmentation in calcium and titanium isotopes

Origins of dipole resonance strength fragmentation in calcium and titanium isotopes

High-resolution study of Gamow-Teller transitions in the47Ti(3He,t)
Ganioğlu¹,
Fujita²,
Fujita³
et al. 2013
Phys. Rev. C

Results from the experimental evaluation of CeBr scintillators for He prompt gamma spectroscopy

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Nuclear Data Sheets for A = 47

Cited by 63 publications

References 180 publications

Origins of dipole resonance strength fragmentation in calcium and titanium isotopes

Origins of dipole resonance strength fragmentation in calcium and titanium isotopes

High-resolution study of Gamow-Teller transitions in the47Ti(3He,t)Ganioğlu1, Fujita2, Fujita3 et al. 2013Phys. Rev. C

Results from the experimental evaluation of CeBr scintillators for He prompt gamma spectroscopy

Contact Info

Product

Resources

About

High-resolution study of Gamow-Teller transitions in the47Ti(3He,t)
Ganioğlu¹,
Fujita²,
Fujita³
et al. 2013
Phys. Rev. C