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英國(guó)Harwell Dosimeters氨酸輻射劑量丸價(jià)格優(yōu)惠！測(cè)量alpha射線，Beta射線，gamma射線，X射線輻射！
品名： Harwell Red 4034 pmma輻射劑量計(jì)，Harwell Amber 3042 pmma 輻射劑量計(jì), Harwell Radspin輻射劑量劑，Harwell Alanine Pellets劑量計(jì)。
品牌： Harwell Dosimeters
丙氨酸劑量計(jì)是一個(gè)認(rèn)可的技術(shù)在各種領(lǐng)域的輻射劑量測(cè)量。在氨基酸丙氨酸輻射與電離輻射引起的自由基的產(chǎn)生（未成對(duì)電子），其中的數(shù)字是吸附在很寬的劑量范圍內(nèi)的劑量成正比。的組織等效劑量計(jì)材料的結(jié)晶結(jié)構(gòu)抵消自由基的重組。一個(gè)衰落的丙氨酸產(chǎn)生的信號(hào)只觀察到劑量值高于其光和位于一個(gè)每年百分之幾的范圍。
的輻射引起的測(cè)量信號(hào)的非破壞性讀出的電子自旋共振（ESR）手術(shù)。用ESR光譜儀仔細(xì)調(diào)整和由內(nèi)到200kGy 2Gy范圍使用適當(dāng)?shù)膭┝坑?jì)的劑量值可確定（3.5%，整體的不確定性在95%的置信水平）。
丙氨酸劑量計(jì)是小，結(jié)構(gòu)緊湊，易于處理的。它們的特點(diǎn)是低的溫度的影響，濕度和劑量率以及較寬的測(cè)量范圍，這使得它們適用于放射治療，血液中的輻照裝置和工業(yè)輻照設(shè)施。由于它的高質(zhì)量和低成本的劑量測(cè)定系統(tǒng)可以利用參考和常規(guī)劑量。
溫度系數(shù)：0.00176 + / - 0.00005 / K
Harwell Alanine Pellets
Harwell Alanine Pellets
When pellets containing the amino acid alanine are irradiated, stable free radicals are produced in concentration which depends on exposure.
The measured response to microwaves of the pellet placed in a manetic field of a paramagnetic resonance spectrometer, is quantitively related to the radiation dose which the pellet absorbed.
Dose Range
Alanine Pellets has a functional dose range of 0.1 kGy to 70 kGy (0.01 kGy to 100kGy may also be achieved) which makes it idea for almost any range of irradiation processes.
Material
A white cylindrical pellet of alanine in a wax binder.
90.9% Amino acid L-alpha alanine
9.1% Paraffin wax
Dimensions
Diameter: 4.82mm +/- 0.01mm (5mm to special order)
Height: 2.8mm +/- 0.1mm
Mass: 60mg +/- 2mg within the overall batch, +/- 0.6mg within a lot. (standard deviation 0.3mg)
Packaging
Two Formats:
Plain Pellets, bulk packed
Alanine Pellets Dosimeters, consisting of pellets sealed in bar coded labelled aluminium foil blisters, packed 1,000 per carton.
Measurement Reproducibility
Mass: CV 0.5%
Irradiation response: CV 0.5% NPL irradiated. (not packed)
Performance
Each batch is verified by NPL comparision.
Shelf-life
Eight years from the date of release
Harwell Radspin輻射劑量劑，Harwell Alanine Pellets劑量計(jì)
