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-   -   ابي فزعتكم ياالفيزيائيين (http://www.phys4arab.net/vb/showthread.php?t=5339)

#ليان# 27-04-2006 17:08

ابي فزعتكم ياالفيزيائيين
 
عندي نص يتكلم عن الفيزياء النووية وابي ترجمته بالعربية
وياليت تساعدوني ولكم خالص شكري مقدماً.....
اليكم النص مع العلم انه يوجد مكان الفراغ معادلات ورموز لم استطع كتابتها:
A nuclear reaction is a process in which a change in the composition and/o energy of a target nucleus is brought about through bombardment with a nuclear particle or gamma ray. The objectives of experimental nuclear-reaction studies are twofold:(1) The experimental data obtained about the reaction mechanism itself can be compared with the predictions of theories about the process; and (2) nuclear reaction one of the most powerful tools of nuclear spectroscopy, i.e., the mapping of nuclear energy levels. The level schemes, with all the pertinent information about each state, of course, constitute the most valuable data for testing theories of nuclear structure.
When a given target nucleus interacts with a particle of sufficient kinetic energy there are, in general, many ways for the reaction to proceed. As an example, let us study what possible end products may result from reactions initiated by 6-MeV deuterons on a......... target. In a nuclear reaction of transmutation or scattering process.The number of protons and the number of neutrons are conserved. We therefore make an energy-level diagram containing nuclei and nuclear particles with a total proton number of 20 and a total neutron number of 21. All such systems of interest in this connection are shown in fig. 13-1. The total energy in the center-of-mass system equals the sum of the rest energies of...... and...... plus the 6-MeV kinetic energy reduced from laboratory to center-of-mass coordinates, as follows (nonrelativistic):
CM velocity, .......................
KE in CM,...........................
Where m is the mass of the incident particle, the deuteron, and M is the mass of the target nucleus , With m=2, M=39, and........ =6.00 MeV, we get.......=5.71 MeV . In Fig. 13-1, the top dashed horizontal line at20.18 MeV above the ground state of ..........represents the total energy of the system. The following

#ليان# 28-04-2006 01:28

مشاركة: ابي فزعتكم ياالفيزيائيين
 
ماهقيتها منكم يالفيزيائيين
وينــــــــــــــــــــــــــــــــــكم؟؟؟؟؟

#ليان# 29-04-2006 23:59

مشاركة: ابي فزعتكم ياالفيزيائيين
 
:confused:حطمتــــــــــــــــــــــــــــــــــــ ـــــــــــــــــــوني:confused:
:(:(:(:(:eek::eek::eek::eek::(:(:(:confused::confu sed::o:o:o:confused::confused::eek::eek::eek::(:(: (


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