The Radioactive Substances: Their Properties and BehaviourK. Paul, Trench, Trübner & Company, Limited, 1908 - 301 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 26
Pagina 60
... half its original activity at the end of about 140 days . This is the first instance that has come to our notice of the loss of activity with time , and we shall have to return to this important property of radioactive sub- stances ...
... half its original activity at the end of about 140 days . This is the first instance that has come to our notice of the loss of activity with time , and we shall have to return to this important property of radioactive sub- stances ...
Pagina 71
... half its original value . The addition of a further layer of 005 millimetres of aluminium cuts down the radiation again to half , and so on for successive layers . If , however , this process is continued , it is found that the ...
... half its original value . The addition of a further layer of 005 millimetres of aluminium cuts down the radiation again to half , and so on for successive layers . If , however , this process is continued , it is found that the ...
Pagina 72
... half . On proceeding still further a similar sequence of phenomena occurs , the radiation ultimately reaching a third constant level . In order to reduce this , it is necessary to interpose even greater thicknesses of aluminium , 8 ...
... half . On proceeding still further a similar sequence of phenomena occurs , the radiation ultimately reaching a third constant level . In order to reduce this , it is necessary to interpose even greater thicknesses of aluminium , 8 ...
Pagina 82
... half the atomic weight of helium . The a particle is therefore either not an atom of helium at all or it must have twice the charge carried by the hydrogen ion . Rutherford discusses the question and inclines to the latter view ; but if ...
... half the atomic weight of helium . The a particle is therefore either not an atom of helium at all or it must have twice the charge carried by the hydrogen ion . Rutherford discusses the question and inclines to the latter view ; but if ...
Pagina 108
... half the initial velocity of the particular rays examined could be detected by no known means . Hence there may be such a rays emitted from many bodies with velocities below this critical value , of which we are unconscious . The ...
... half the initial velocity of the particular rays examined could be detected by no known means . Hence there may be such a rays emitted from many bodies with velocities below this critical value , of which we are unconscious . The ...
Alte ediții - Afișează-le pe toate
Termeni și expresii frecvente
absorption actinium active deposit ALPHA RAYS aluminium atomic weight barium Becquerel bismuth Boltwood cathode rays centimetres charge carried charged particles chemical considered contained corpuscles crystals Curie and Danne deflected density detected discovery effect electric field electrolysis electrometer electroscope emana experiments exposed fact fluorescence formed Fourth Edition gases gramme of radium heat helium hydrogen Illustrations insulated ionization J. J. Thomson known light LL.D Madame Curie magnetic field matter measured metals method minerals nature negative ions negatively charged obtained passing phenomena Phil pitchblende polonium present pressure produced properties quantity of emanation quantity of radium radiation emitted radio radioactive bodies radioactive elements radioactive substances radium bromide radium chloride radium emanation radium salt rate of decay removed Röntgen rays Rutherford Rutherford and Soddy seen separated shown solution temperature thorium thorium emanation tion transformed tube uranium velocity vessel weight of radium wire