Preparation of carrier-free 28Mg by means of photonuclear reactions

Yagi, Masayuki; Yamadera, A.; Fujikawa, Shigeo; Shiokawa, Takanobu

doi:10.1016/0020-708x(75)90017-4

Cited by 9 publications

(7 citation statements)

References 2 publications

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“…are fairly high, especially for the light and medium mass target nuclei. As an example, the excitation functions of the four investigated reactions for the production of 73 Se, namely 75 As(p,3n), 75 As(d,4n), 72 Ge( 3 He,2n) and 70 Ge( ,n), (cf. [48][49][50][51][52][53]) are shown in Figure 3.…”

Section: Generalmentioning

confidence: 99%

“…) the stopping power, ) the cross section at energy , the decay constant of the product and the time 75 As(p,3n) 73 Se, 75 As(d,4n) 73 Se, 72 Ge( 3 He,2n) 73 Se and 70 Ge( ,n) 73 Se drawn using the data in References [48][49][50][51][52][53].…”

Section: Generalmentioning

confidence: 99%

“…Thick target yields of 73 Se calculated from the excitation functions of 75 As(p,3n) 73 As, 75 As(d,4n) 73 Se, 72 Ge( 3 He,2n) 73 Se and 70 Ge( ,n) 73 Se reactions shown in Figure 3.…”

Section: Figurementioning

confidence: 99%

“…In all those cases limited scale production could also be achieved through -particle induced reactions, as discussed below. The radionuclides 52 Fe, 57 Ni, 68 Ge( 68 Ga), 72 Se( 72 As), 72 As, 73 Table 3: Radionuclides produced in limited amounts using the -particle beam in comparison to their large scale production via other nuclear processes.…”

Section: Limited Scale Production Of Radionuclides Using -Particlesmentioning

confidence: 99%

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Uses of alpha particles, especially in nuclear reaction studies and medical radionuclide production

et al. 2016

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Alpha particles exhibit three important characteristics: scattering, ionisation and activation. This article briefly discusses those properties and outlines their major applications. Among others, -particles are used in elemental analysis, investigation and improvement of materials properties, nuclear reaction studies and medical radionuclide production. The latter two topics, dealing with activation of target materials, are treated in some detail in this paper. Measurements of excitation functions of -particle induced reactions shed some light on their reaction mechanisms, and studies of isomeric cross sections reveal the probability of population of highspin nuclear levels. Regarding medical radionuclides, an overview is presented of the isotopes commonly produced using -particle beams. Consideration is also given to some routes which could be potentially useful for production of a few other radionuclides. The significance of -particle induced reactions to produce a few high-spin isomeric states, decaying by emission of low-energy conversion or Auger electrons, which are of interest in localised internal radiotherapy, is outlined. The -particle beam, thus broadens the scope of nuclear chemistry research related to development of non-standard positron emitters and therapeutic radionuclides.

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Section: Generalmentioning

confidence: 99%

Section: Generalmentioning

confidence: 99%

“…Thick target yields of 73 Se calculated from the excitation functions of 75 As(p,3n) 73 As, 75 As(d,4n) 73 Se, 72 Ge( 3 He,2n) 73 Se and 70 Ge( ,n) 73 Se reactions shown in Figure 3.…”

Section: Figurementioning

confidence: 99%

Section: Limited Scale Production Of Radionuclides Using -Particlesmentioning

confidence: 99%

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Uses of alpha particles, especially in nuclear reaction studies and medical radionuclide production

et al. 2016

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“…Photonuclear production via the reaction 3oSi(y,2p)28Mg has been investigated earlier by others, who reported yields of 20 pCi of 28Mg using high-energy Bremsstrahlung generated by a 60 MeV e-beam (6).…”

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confidence: 98%

Photonuclear production of ²⁸MG(→²⁸AL)

Polak

Wijand

Lindner

1989

Labelled Comp Radiopharmac

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The radionuclide 28Mg ( t 1~ = 20.9 h) decays by p-, yemissions (E 0.46 MeV, E+ = 0.031 i95 %), 0.400 (36 %), 0.942 (36 %), 1.342 (54 %) MeV) to the shor&lGed radioactive daughter Next to 7Mg (t1/2 = 9.9 min), 2*Mg is ?he longest-lived radionuclide of magnesium and therefore of considerable interest as a tracer, notably for physiological investigations (1,2). However, wide-spread application has been hampered by its restricted availability. This is because of difficulties encountered in its production due primarily to 28Mg being neutron-rich and fairly far from the line of p-stability.For its production both neutron and charged particle induced reactions (5-9) have been tested. Neutron irradiation of LiMg alloys in a nuclear reactor can produce some tens to hundreds of pCi's by way of the sequential processes 6Li(n,a)t/26Mg(t,p)2gMg, but the final product is of low specific activity (3). A routine procedure for a no-carrier-added product of high specific activity uses a 150 MeV a particle beam for the reaction 27Al(01,3p)~8Mg yielding batches of a few mCi after 6 hours of bombardment (8).Photonuclear production via the reaction 3oSi(y,2p)28Mg has been investigated earlier by others, who reported yields of 20 pCi of 28Mg using high-energy Bremsstrahlung generated by a 60 MeV e-beam (6).There is an on-going effort to explore the potential of the 500 MeV e-linac of our Institute for producing certain radionuclides of interest for application. The inherent problem associated with this kind of work is the necessity to have bulky targets in order to cope with the high penetrating power of Bremsstrahlung and the low cross sections of photonuclear reactions. We recently reported on the production of 67Cu using a low energy beam (Ee-I 140 MeV) (10). The production of BMg is considered a test case for production at the high energies available, notably at the site where the waste beam of physics experiments is dumped.To this end we measured photonuclear cross sections of a number of production reactions, studied targetry problems and designed procedures for the chemical separation of BMg from the bulk of target material (several tens of grams) and for its final purification. Cross sections (0,) measured are compiled in Table 1. 8A1 (tl13= 2.241 min, E = 2.86 MeV, E = 1.779 (100 %)). Argon has the disadvantages of having a very low cross-section as well as providing a low-density target if gaseous. Notwithstanding its low cross section phosphorus is still preferred over silicon as aptential target. One reason is that the 100 % natural isotopic abundance of 3lP versus 3.09 % for OSi overcompensates the lower cross section of 31P by a factor of about three in yields. Another reason is that some phosphorus compounds allow for elegant and more efficient target chemistry.

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Excitation functions of high-energy α-particle induced nuclear reactions on aluminium and magnesium: Production of 28Mg

Probst¹,

Qaim²,

Weinreich³

1976

The International Journal of Applied Radiation and Isotopes

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Preparation of carrier-free 28Mg by means of photonuclear reactions

Cited by 9 publications

References 2 publications

Uses of alpha particles, especially in nuclear reaction studies and medical radionuclide production

Uses of alpha particles, especially in nuclear reaction studies and medical radionuclide production

Photonuclear production of ²⁸MG(→²⁸AL)

Excitation functions of high-energy α-particle induced nuclear reactions on aluminium and magnesium: Production of 28Mg

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Preparation of carrier-free 28Mg by means of photonuclear reactions

Cited by 9 publications

References 2 publications

Uses of alpha particles, especially in nuclear reaction studies and medical radionuclide production

Uses of alpha particles, especially in nuclear reaction studies and medical radionuclide production

Photonuclear production of 28MG(→28AL)

Excitation functions of high-energy α-particle induced nuclear reactions on aluminium and magnesium: Production of 28Mg

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Photonuclear production of ²⁸MG(→²⁸AL)